NET INCOME PER SHARE - Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Basic net income per share:
Net income	$ 10,992	$ 6,394
Weighted average common shares outstanding - Basic (in shares)	78,552	74,765
Basic net income per common share (in dollars per share)	$ 0.14	$ 0.09
Diluted net income per share:
Net income	$ 10,992	$ 6,394
Weighted average common shares outstanding - Basic (in shares)	78,552	74,765
Effect of dilutive securities:
Warrants (in shares)	0	2,139
Stock options and restricted stock (in shares)	1,282	1,490
Weighted average common shares for diluted earnings per share (in shares)	79,834	78,394
Diluted net income per common share (in dollars per share)	$ 0.14	$ 0.08