EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator
Income available to common stockholders, Diluted	$ 83,952	$ 55,253
Income available to common stockholders, Basic	$ 83,952	$ 55,253
Denominator (Shares)
Basic (in shares)	65,229	64,009
Diluted (in shares)	67,648	66,111
Per Share Amount
Diluted (in dollars per share)	$ 1.24	$ 0.84
Basic (in dollars per share)	$ 1.29	$ 0.86
Options
Effect of dilutive stock-based compensation
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	1,869	1,810
Restricted Stock Units
Effect of dilutive stock-based compensation
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	550	292