SHAREHOLDERS' EQUITY (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Feb. 20, 2019	Feb. 21, 2018	May 31, 2017
Weighted average shares outstanding:
Weighted average basic common shares (in shares)	12,834,000	12,504,000	11,945,000
Effect of stock options (in shares)	747,000	1,043,000	1,626,000
Effect of dilutive share awards (in shares)	167,000	153,000	111,000
Effect of Convertible Senior Notes and warrants	871,000	397,000	0
Weighted average diluted common shares (in shares)	14,619,000	14,097,000	13,682,000
Additional disclosure
Interest rate	0.625%					0.625%
Common Stock Repurchases
Value of common stock authorized to be repurchased				$ 150,000,000.0	$ 100,000,000.0
Purchase of treasury stock (in shares)	22,731	379,449	75,393
Value of treasury stock acquired	$ 5,470,000	$ 92,606,000	$ 21,000,000.0
Remaining authorized repurchase amount	$ 179,700,000
Stock Options, One
Additional disclosure
Anti-dilutive securities excluded from calculation of diluted earnings per share	0.1	0.4	0.1