SHAREHOLDERS' EQUITY (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jul. 24, 2020	Feb. 28, 2019	Feb. 28, 2018
Weighted average shares outstanding:
Weighted average basic common shares (in shares)	13,199,000	13,007,000	12,834,000
Effect of stock options (in shares)	407,000	0	747,000
Effect of dilutive share awards (in shares)	89,000	0	167,000
Effect of Convertible Senior Notes and warrants (in shares)	0	0	871,000
Weighted average diluted common shares (in shares)	13,695,000	13,007,000	14,619,000
Additional disclosure
Anti-dilutive securities excluded from calculation of diluted earnings per share		1,100,000
Common Stock Repurchases
Value of common stock authorized to be repurchased					$ 150,000,000	$ 100,000,000
Purchase of treasury stock (in shares)	334,253		22,731
Value of treasury stock acquired	$ 40,008,000		$ 5,470,000
Remaining authorized repurchase amount	$ 139,700,000
2025 Convertible Notes
Additional disclosure
Interest rate	0.50%			0.50%
2022 Convertible Notes
Additional disclosure
Interest rate	0.625%	0.625%	0.625%
Stock Options
Additional disclosure
Anti-dilutive securities excluded from calculation of diluted earnings per share	900,000	200,000	100,000
RSUs
Additional disclosure
Anti-dilutive securities excluded from calculation of diluted earnings per share	100,000