EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Unvested service-based restricted shares (in shares)	700			700			700	700
Numerator:
Net income	$ 25,091	$ 13,796	$ 11,863	$ 14,510	$ 14,460	$ 11,502	$ 50,750	$ 40,473
Less: Income allocated to participating securities	(266)			(156)			(544)	(443)
Net income available to common stockholders	$ 24,825			$ 14,354			$ 50,206	$ 40,030
Denominator:
Weighted average shares - basic (in shares)	67,025			66,960			67,004	66,858
Performance-based restricted stock awards (in shares)	0			0			0	0
Weighted average shares - diluted (in shares)	67,025			66,960			67,004	66,858
Basic net income per share (in usd per share)	$ 0.37			$ 0.21			$ 0.75	$ 0.60
Diluted net income per share (in usd per share)	$ 0.37			$ 0.21			$ 0.75	$ 0.60