v3.21.1
DEBT - Schedule of Long-term Debt (Details) - USD ($)
$ in Thousands
Mar. 28, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Total long-term debt $ 813,000 $ 840,000
Less: convertible notes debt discount, net (14,304) (16,072)
Less: term loan deferred financing costs, net (404) (434)
Less: current maturities of long-term debt (7,500) (7,500)
Total long-term debt, less current maturities, net $ 785,849 810,907
1.0% convertible notes due 2023    
Debt Instrument [Line Items]    
Stated interest rate 0.01%  
Total long-term debt $ 172,500 172,500
Term loan due 2024    
Debt Instrument [Line Items]    
Total long-term debt 92,500 92,500
Revolver due 2024    
Debt Instrument [Line Items]    
Total long-term debt $ 248,000 275,000
Senior Note | 7.50% Senior Notes Due 2027    
Debt Instrument [Line Items]    
Stated interest rate 0.075%  
7.5% senior notes due 2027 $ 300,000 300,000
Less: senior notes deferred financing costs, net $ (4,943) $ (5,087)