Condensed Consolidated Statements of Changes In Stockholders' Equity - USD ($) $ in Thousands	Total	Capital Stock Preferred	Issued Common	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive income	Treasury Stock	Non-controlling Interest
Balance at beginning of period at Dec. 31, 2019	$ 231,044	$ 4	$ 6,715	$ 14,029	$ 230,784	$ (246)	$ (20,242)
Comprehensive income:
Net income	9,842				9,842
Other comprehensive income	(6)					(6)
Dividends and dividend equivalents of $0.12 per common share and per restricted stock unit, net of estimated forfeitures	(2,059)				(2,059)
Share-based compensation	902			902
Stock shares awarded, forfeited or vested	237			(567)			804
Stock shares repurchased	(4,395)						(4,395)
Balance at end of period at Mar. 31, 2020	235,565	4	6,715	14,364	238,567	(252)	(23,833)
Balance at beginning of period at Dec. 31, 2019	231,044	4	6,715	14,029	230,784	(246)	(20,242)
Comprehensive income:
Net income	18,332
Other comprehensive income	15
Balance at end of period at Jun. 30, 2020	242,697	4	6,715	15,026	245,016	(231)	(23,833)
Balance at beginning of period at Mar. 31, 2020	235,565	4	6,715	14,364	238,567	(252)	(23,833)
Comprehensive income:
Net income	8,490				8,490
Other comprehensive income	21					21
Dividends and dividend equivalents of $0.12 per common share and per restricted stock unit, net of estimated forfeitures	(2,041)				(2,041)
Share-based compensation	662			662
Balance at end of period at Jun. 30, 2020	242,697	4	6,715	15,026	245,016	(231)	(23,833)
Balance at beginning of period at Dec. 31, 2020	262,526	4	6,715	15,503	262,943	486	(23,125)	$ 0
Comprehensive income:
Net income	15,427				15,427
Other comprehensive income	55					55
Dividends and dividend equivalents of $0.12 per common share and per restricted stock unit, net of estimated forfeitures	(2,052)				(2,052)
Share-based compensation	3,229			3,229
Stock shares awarded, forfeited or vested	0			(716)			716
Stock shares repurchased	(674)						(674)
Balance at end of period at Mar. 31, 2021	278,511	4	6,715	18,016	276,318	541	(23,083)	0
Balance at beginning of period at Dec. 31, 2020	262,526	4	6,715	15,503	262,943	486	(23,125)	0
Comprehensive income:
Net income	35,486
Other comprehensive income	56
Balance at end of period at Jun. 30, 2021	593,502	4	6,715	315,062	293,724	542	(22,469)	(76)
Balance at beginning of period at Mar. 31, 2021	278,511	4	6,715	18,016	276,318	541	(23,083)	0
Comprehensive income:
Net income	20,059
Net income	19,983				20,059			(76)
Other comprehensive income	1					1
Dividends and dividend equivalents of $0.12 per common share and per restricted stock unit, net of estimated forfeitures	(2,653)				(2,653)
Share-based compensation	1,538			1,538
Stock shares awarded, forfeited or vested	0			(705)			705
Stock shares repurchased	(91)						(91)
Equity consideration for Merger	296,213			296,213
Balance at end of period at Jun. 30, 2021	$ 593,502	$ 4	$ 6,715	$ 315,062	$ 293,724	$ 542	$ (22,469)	$ (76)