SHAREHOLDERS' EQUITY (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Jul. 24, 2020	Feb. 28, 2019	Feb. 28, 2018
Weighted average shares outstanding:
Weighted average basic common shares (in shares)	12,723,000	13,243,000	12,812,000	13,157,000
Effect of stock options (in shares)	0	394,000	0	523,000
Effect of dilutive share awards (in shares)	0	72,000	0	103,000
Effect of Convertible Senior Notes (in shares)	0	10,000	0	130,000
Weighted average diluted common shares (in shares)	12,723,000	13,719,000	12,812,000	13,913,000
Additional disclosure
Antidilutive securities excluded from computation of earnings per share (in shares)	200,000		200,000
Common stock repurchases
Value of common stock authorized to be repurchased						$ 150.0	$ 100.0
Purchased shares of common stock under stock repurchase program (in shares)			379,895
Remaining authorized repurchase amount	$ 96.7		$ 96.7
2025 Convertible Notes | Convertible Debt
Additional disclosure
Stated interest rate	0.50%		0.50%		0.50%
2022 Convertible Notes | Convertible Debt
Additional disclosure
Stated interest rate	0.625%		0.625%
Option
Additional disclosure
Antidilutive securities excluded from computation of earnings per share (in shares)	1,000,000	900,000	1,000,000	400,000
Restricted Stock Units (RSUs)
Additional disclosure
Antidilutive securities excluded from computation of earnings per share (in shares)	500,000	200,000	400,000
Convertible Debt
Additional disclosure
Antidilutive securities excluded from computation of earnings per share (in shares)	2,100,000		2,100,000