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Debt Instrument, Unamortized Debt Discount, Difference In Aggregate Face Amount And Future Cash Flows

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Debt Instrument, Unamortized Debt Discount, Portion Attributable To Issuance Costs

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Debt Redemption, Change of Control

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Line of Credit Facility, Increase (Decrease) in Borrowing Capacity

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of the required periodic payments including both interest and principal payments.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Amount, after accumulated amortization, of debt discount.

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- Definition

Amount of commitment fees for the unused borrowing capacity under the long-term financing arrangement that is available to the entity.

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Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Amount of cash paid for interest, including, but not limited to, capitalized interest and payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount; classified as operating and investing activities.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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Indebtedness divided by net capital.

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DEBT - Narrative (Details)		1 Months Ended	3 Months Ended		9 Months Ended
DEBT - Narrative (Details)	Sep. 17, 2019 USD ($)	Jan. 31, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	Jun. 05, 2018 USD ($)
Line of Credit Facility [Line Items]
Outstanding debt			$ 707,500,000		$ 707,500,000		$ 661,082,000
Interest paid			6,900,000	$ 6,600,000	19,700,000	$ 12,200,000
Debt discount			25,023,000		25,023,000		30,125,000
Line of Credit
Line of Credit Facility [Line Items]
Outstanding debt			135,000,000		135,000,000		392,332,000
Term Loan
Line of Credit Facility [Line Items]
Outstanding debt			100,000,000		100,000,000		96,250,000
Convertible Debt
Line of Credit Facility [Line Items]
Outstanding debt			172,500,000		$ 172,500,000		172,500,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Unused capacity, commitment fee percentage					0.20%
Revolving Credit Facility \| London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Long-term line of credit			$ 135,000,000.0		$ 135,000,000.0
Debt instrument, basis spread on variable rate					1.50%
Debt instrument, effective interest rate			3.54%		3.54%
Revolving Credit Facility \| Line of Credit
Line of Credit Facility [Line Items]
Consolidated leverage ratio			4.50		4.50
7.50% Senior Notes Due 2027
Line of Credit Facility [Line Items]
Debt Instrument, Redemption Price, Percentage	100.00%
7.50% Senior Notes Due 2027 \| Senior Notes
Line of Credit Facility [Line Items]
Aggregate principal amount	$ 300,000,000
Debt instrument, effective interest rate	7.83%
Debt Issuance Costs, Gross	$ 6,000,000.0		$ 5,979,000		$ 5,979,000		$ 0
Debt Instrument, Redemption Price, Percentage	107.50%
Redemption price if company experiences specific kinds of changes in control	101.00%
Stated interest rate	7.50%
2019 Credit Facility \| Term Loan
Line of Credit Facility [Line Items]
Aggregate principal amount	$ 100,000,000
Increase in borrowing capacity	250,000,000
2019 Credit Facility \| Revolving Credit Facility \| Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	550,000,000
Consolidated leverage ratio			4.00		4.00
Consolidated fixed charge coverage ratio					150.00%
2018 Credit Facility \| Term Loan
Line of Credit Facility [Line Items]
Aggregate principal amount								$ 100,000,000
Gain (loss) on extinguishment of debt	(700,000)
2018 Credit Facility \| Revolving Credit Facility \| Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity								$ 800,000,000
Convertible Senior Notes Due 2023 \| Convertible Debt
Line of Credit Facility [Line Items]
Aggregate principal amount		$ 172,500,000
Debt instrument, effective interest rate			5.25%		5.25%		5.25%
Stated interest rate		1.00%
Debt discount		$ 36,000,000	$ 25,000,000.0		$ 25,000,000.0		$ 30,100,000
Value of Future Cash Flow		31,900,000
Debt discount portion of issuance cost		$ 4,100,000
Debt conversion ratio		0.0113785
Maximum
Line of Credit Facility [Line Items]
Debt Instrument, Unused Borrowing Capacity, Fee	$ 0.00225
Maximum \| Base Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	0.75%
Maximum \| London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	1.75%
Maximum \| 7.50% Senior Notes Due 2027 \| Senior Notes
Line of Credit Facility [Line Items]
Debt Instrument, Redemption Price, Percentage	40.00%
Minimum
Line of Credit Facility [Line Items]
Debt Instrument, Unused Borrowing Capacity, Fee	$ 0.0015
Minimum \| Base Rate
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	0.00%
Minimum \| London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	1.00%
September 30, 2019 through June 30, 2021 \| 2019 Credit Facility \| Term Loan
Line of Credit Facility [Line Items]
Debt Instrument, Periodic Payment					1,250,000
September 30, 2021 and Thereafter \| 2019 Credit Facility \| Term Loan
Line of Credit Facility [Line Items]
Debt Instrument, Periodic Payment					$ 2,500,000