CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Treasury Stock	Non-controlling Interest	Total
Beginning Balance (in shares) at Dec. 31, 2018	60,672,034
Beginning Balance at Dec. 31, 2018	$ 331,395	$ 187,450	$ (674)		$ 14,940	$ 533,111
Increase (Decrease) in Stockholders' Equity
Allocation of ownership interest	(1,209)				1,209
Capital contribution from non-controlling interest					3,468	3,468
Capital distribution to non-controlling interest					(200)	(200)
Stock based compensation expense	$ 23					23
Repurchase of common shares				$ (7,073)		(7,073)
Repurchase of common shares (in shares)	(471,500)
Other comprehensive income (loss)			604			604
Net (loss) income		12,370			(163)	12,207
Ending Balance at Jun. 30, 2019	$ 330,209	199,820	(70)	(7,073)	19,254	542,140
Ending Balance (in shares) at Jun. 30, 2019	60,200,534
Beginning Balance (in shares) at Mar. 31, 2019	60,200,534
Beginning Balance at Mar. 31, 2019	$ 331,408	189,447	(68)	(7,073)	16,606	530,320
Increase (Decrease) in Stockholders' Equity
Allocation of ownership interest	(1,209)				1,209
Capital contribution from non-controlling interest					1,784	1,784
Capital distribution to non-controlling interest					(200)	(200)
Stock based compensation expense	10					10
Other comprehensive income (loss)			(2)			(2)
Net (loss) income		10,373			(145)	10,228
Ending Balance at Jun. 30, 2019	$ 330,209	199,820	(70)	(7,073)	19,254	542,140
Ending Balance (in shares) at Jun. 30, 2019	60,200,534
Increase (Decrease) in Stockholders' Equity
Adoption of ASU, net of tax		(90)				$ (90)
Beginning Balance (in shares) at Dec. 31, 2019	59,414,583					59,414,583
Beginning Balance at Dec. 31, 2019	$ 305,631	214,225	(335)		10,149	$ 529,670
Increase (Decrease) in Stockholders' Equity
Capital contribution from non-controlling interest					5,139	5,139
Stock based compensation expense	$ 45					45
Repurchase of common shares				(8,803)		(8,803)
Repurchase of common shares (in shares)	(532,034)
Other comprehensive income (loss)			(1,195)			(1,195)
Net (loss) income		17,666			218	17,884
Ending Balance at Jun. 30, 2020	$ 305,676	231,801	(1,530)	(8,803)	15,506	$ 542,650
Ending Balance (in shares) at Jun. 30, 2020	58,882,549					58,882,549
Beginning Balance (in shares) at Mar. 31, 2020	59,003,470
Beginning Balance at Mar. 31, 2020	$ 305,658	212,602	(890)	(6,807)	10,347	$ 520,910
Increase (Decrease) in Stockholders' Equity
Capital contribution from non-controlling interest					5,139	5,139
Stock based compensation expense	$ 18					18
Repurchase of common shares				(1,996)		(1,996)
Repurchase of common shares (in shares)	(120,921)
Other comprehensive income (loss)			(640)			(640)
Net (loss) income		19,199			20	19,219
Ending Balance at Jun. 30, 2020	$ 305,676	$ 231,801	$ (1,530)	$ (8,803)	$ 15,506	$ 542,650
Ending Balance (in shares) at Jun. 30, 2020	58,882,549					58,882,549