v3.22.0.1
COMPENSATION PLANS - Summary of Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Shares      
Outstanding beginning of year (in shares) 1,015,000 536,000 545,000
Granted during the year (in shares) 0 495,000 0
Forfeited during the year (in shares) (32,000) (4,000) 0
Exercised during the year (in shares) (615,000) (12,000) (9,000)
Outstanding, end of year (in shares) 368,000 1,015,000 536,000
Weighted Average Exercise Price      
Outstanding beginning of year (in USD per share) $ 43.88 $ 45.11 $ 44.35
Granted during the year (in USD per share) 0 42.87 0
Forfeited during the year (in USD per share) 41.33 54 0
Exercised during the year (in USD per share) 44.11 53.83 0.67
Outstanding, end of year (in USD per share) $ 43.72 $ 43.88 $ 45.11
Vested Options:      
Vested during the year (in shares) 248,000 115,000 115,000
Vested during the year (in USD per share) $ 46.70 $ 50.46 $ 50.46
Eligible, end of year for exercise (in shares) 67,000 439,000 336,000
Eligible, end of year for exercise (in USD per share) $ 47.05 $ 43.19 $ 41.07
Aggregate intrinsic value ($ in thousands):      
Total options outstanding $ 13,593 $ 24,838 $ 4,398
Options exercisable 2,268 11,047 4,051
Options exercised $ 26,348 $ 97 $ 381
Weighted average fair value of options granted during the year (in USD per share)   $ 15.17  
Stock Appreciation Rights (SARs)      
Shares      
Outstanding beginning of year (in shares) 485,000 535,000 535,000
Granted during the year (in shares) 0 0 0
Forfeited during the year (in shares) 0 (10,000) 0
Exercised during the year (in shares) (261,000) (40,000) 0
Outstanding, end of year (in shares) 224,000 485,000 535,000
Weighted Average Exercise Price      
Outstanding beginning of year (in USD per share) $ 56.96 $ 54.53 $ 54.53
Granted during the year (in USD per share) 0 0 0
Forfeited during the year (in USD per share) 0 68.01 0
Exercised during the year (in USD per share) 50.63 22.39 0
Outstanding, end of year (in USD per share) $ 64.33 $ 56.96 $ 54.53
Vested Options:      
Vested during the year (in shares) 85,000 115,000 115,000
Vested during the year (in USD per share) $ 63.86 $ 60.71 $ 60.71
Eligible, end of year for exercise (in shares) 224,000 404,000 336,000
Eligible, end of year for exercise (in USD per share) $ 64.33 $ 55.58 $ 50.04
Aggregate intrinsic value ($ in thousands):      
Total options outstanding $ 3,669 $ 6,032 $ 3,190
Options exercisable 3,669 5,540 3,066
Options exercised $ 9,045 $ 1,918 $ 0