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)
Cash dividends on common stock	(2,569)
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, 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	6,781
Net Income (Loss), Parent	6,566	0	0	0	6,566	6,566		0
Net Income (Loss), NCI	215						215
Other Comprehensive Income (Loss), Parent		$ 0	0	0	0	18,678		18,678
Other Comprehensive Income (Loss), NCI							221
Other Comprehensive Income (Loss), Total	18,899
Shares Issued, Shares, Share-based Payment Arrangement, before Forfeiture		246,606
Stock Issued During Period, Value, Restricted Stock Award, Gross	1,578	$ 0	1,578	0	0	1,578	0	0
Cash dividends on common stock	(5,139)	$ 0	0	0	(5,139)	(5,139)	0	0
Ending Balance (shares) at Jun. 30, 2019		43,231,184
Ending Balance (Total) at Jun. 30, 2019	562,488
Ending Balance (Parent) at Jun. 30, 2019		$ 4	390,719	(431)	141,973	541,913		9,648
Ending balance (NCI) at Jun. 30, 2019							20,575
Beginning balance (shares) at Mar. 31, 2019		43,008,729
Beginning balance (Total) at Mar. 31, 2019	558,961
Beginning balance (NCI) at Mar. 31, 2019							20,370
Beginning balance (Parent) at Mar. 31, 2019		$ 4	390,042	(431)	147,446	538,591		1,530
Net Income (Loss), Total	(2,797)
Net Income (Loss), Parent	(2,903)	0	0	0	(2,903)	(2,903)		0
Net Income (Loss), NCI	106						106
Other Comprehensive Income (Loss), Parent		$ 0	0	0	0	8,118		8,118
Other Comprehensive Income (Loss), NCI							99
Other Comprehensive Income (Loss), Total	8,217
Shares Issued, Shares, Share-based Payment Arrangement, before Forfeiture		222,455
Stock Issued During Period, Value, Restricted Stock Award, Gross	677	$ 0	677	0	0	677	0	0
Cash dividends on common stock	(2,570)	$ 0	0	0	(2,570)	(2,570)	0	0
Ending Balance (shares) at Jun. 30, 2019		43,231,184
Ending Balance (Total) at Jun. 30, 2019	$ 562,488
Ending Balance (Parent) at Jun. 30, 2019		$ 4	390,719	(431)	141,973	541,913		9,648
Ending balance (NCI) at Jun. 30, 2019							20,575
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
Cash dividends on common stock	(2,571)
Ending Balance (shares) at Mar. 31, 2020		42,943,447
Ending Balance (Total) at Mar. 31, 2020	$ 506,157
Ending Balance (Parent) at Mar. 31, 2020		$ 4	392,552	(431)	84,838	485,456		8,493
Ending balance (NCI) at Mar. 31, 2020							20,701
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	11,926
Net Income (Loss), Parent	11,551	0	0	0	11,551	11,551		0
Net Income (Loss), NCI	375						375
Other Comprehensive Income (Loss), Parent		$ 0	0	0	0	18,208		18,208
Other Comprehensive Income (Loss), NCI							148
Other Comprehensive Income (Loss), Total	18,356
Shares Issued, Shares, Share-based Payment Arrangement, before Forfeiture		40,305
Stock Issued During Period, Value, Restricted Stock Award, Gross	781	$ 0	781	0	0	781	0	0
Cash dividends on common stock	$ (5,149)	$ 0	0	0	(5,149)	(5,149)	0	0
Ending Balance (shares) at Jun. 30, 2020	43,068,379	43,068,379
Ending Balance (Total) at Jun. 30, 2020	$ 549,517
Ending Balance (Parent) at Jun. 30, 2020	528,267	$ 4	392,633	(431)	106,534	528,267		29,527
Ending balance (NCI) at Jun. 30, 2020	21,250						21,250
Beginning balance (shares) at Mar. 31, 2020		42,943,447
Beginning balance (Total) at Mar. 31, 2020	506,157
Beginning balance (NCI) at Mar. 31, 2020							20,701
Beginning balance (Parent) at Mar. 31, 2020		$ 4	392,552	(431)	84,838	485,456		8,493
Net Income (Loss), Total	24,442
Net Income (Loss), Parent	24,274	0	0	0	24,274	24,274		0
Net Income (Loss), NCI	168						168
Other Comprehensive Income (Loss), Parent		0	0	0	0	21,034		21,034
Other Comprehensive Income (Loss), NCI							381
Other Comprehensive Income (Loss), Total	21,415
Effect of new accounting principle in period of adoption	(262)	$ 0	0	0	(262)	(262)	0	0
Shares Issued, Shares, Share-based Payment Arrangement, before Forfeiture		124,932
Stock Issued During Period, Value, Restricted Stock Award, Gross	81	$ 0	81	0	0	81	0	0
Cash dividends on common stock	$ (2,578)	$ 0	0	0	(2,578)	(2,578)	0	0
Ending Balance (shares) at Jun. 30, 2020	43,068,379	43,068,379
Ending Balance (Total) at Jun. 30, 2020	$ 549,517
Ending Balance (Parent) at Jun. 30, 2020	528,267	$ 4	$ 392,633	$ (431)	$ 106,534	$ 528,267		$ 29,527
Ending balance (NCI) at Jun. 30, 2020	$ 21,250						$ 21,250