Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Parent	Noncontrolling Interest	Comprehensive Income
Beginning balance (shares) at Dec. 31, 2018		42,984,578
Beginning balance (Total) at Dec. 31, 2018	$ 540,369
Beginning balance (NCI) at Dec. 31, 2018							$ 20,139
Beginning balance (Parent) at Dec. 31, 2018		$ 4	$ 389,141	$ (431)	$ 140,546	$ 520,230		$ (9,030)
Net Income (Loss), Total	9,578
Net Income (Loss), Parent	9,469	0	0	0	9,469	9,469		0
Net Income (Loss), NCI	109						109
Other Comprehensive Income (Loss), Parent		$ 0	0	0	0	10,560		10,560
Other Comprehensive Income (Loss), NCI							122
Other Comprehensive Income (Loss), Total	10,682
Stock Issued During Period, Shares, Shares-based Compensation, Gross		24,151
Stock Issued During Period, Value, Restricted Stock Award, Gross	901	$ 0	901	0	0	901	0	0
Cash dividends on common stock	(2,569)	$ 0	0	0	(2,569)	(2,569)	0	0
Ending Balance (shares) at Mar. 31, 2019		43,008,729
Ending Balance (Total) at Mar. 31, 2019	$ 558,961
Ending Balance (Parent) at Mar. 31, 2019		$ 4	390,042	(431)	147,446	538,591		1,530
Ending balance (NCI) at Mar. 31, 2019							20,370
Beginning balance (shares) at Dec. 31, 2019	43,028,074	43,028,074
Beginning balance (Total) at Dec. 31, 2019	$ 523,865
Beginning balance (NCI) at Dec. 31, 2019	20,727						20,727
Beginning balance (Parent) at Dec. 31, 2019	503,138	$ 4	391,852	(431)	100,394	503,138		11,319
Net Income (Loss), Total	(12,516)
Net Income (Loss), Parent	(12,723)	0	0	0	(12,723)	(12,723)		0
Net Income (Loss), NCI	207						207
Other Comprehensive Income (Loss), Parent		0	0	0	0	(2,826)		(2,826)
Other Comprehensive Income (Loss), NCI							(233)
Other Comprehensive Income (Loss), Total	(3,059)
Effect of new accounting principle in period of adoption	(262)	$ 0	0	0	(262)	(262)	0	0
Stock Issued During Period, Shares, Shares-based Compensation, Gross		(84,627)
Stock Issued During Period, Value, Restricted Stock Award, Gross	700	$ 0	700	0	0	700	0	0
Cash dividends on common stock	$ (2,571)	$ 0	0	0	(2,571)	(2,571)	0	0
Ending Balance (shares) at Mar. 31, 2020	42,943,447	42,943,447
Ending Balance (Total) at Mar. 31, 2020	$ 506,157
Ending Balance (Parent) at Mar. 31, 2020	485,456	$ 4	$ 392,552	$ (431)	$ 84,838	$ 485,456		$ 8,493
Ending balance (NCI) at Mar. 31, 2020	$ 20,701						$ 20,701