NET INCOME PER COMMON SHARE - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net Income (Loss) Attributable to Parent	$ 184,213	$ 133,372	$ 138,304
Adjustment for Basic EPS:
Earnings allocated to unvested shareholders	1,137	(1,001)	(1,106)
Adjusted net income	$ 183,076	$ 132,371	$ 137,198
Denominator:
Weighted average common shares outstanding – Basic	47,296,447	47,198,982	46,959,775
Effect of dilutive shares:
Common stock equivalents arising from stock options and ESPP	1,010	1,566	1,334
Restricted stock awards and units and performance units	67,978	36,446	34,353
Weighted average common shares outstanding – Diluted	47,365,435	47,236,994	46,995,462
Basic	$ 3.87	$ 2.80	$ 2.92
Diluted	$ 3.87	$ 2.80	$ 2.92