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, 2017		42,753,054
Beginning balance (Total) at Dec. 31, 2017	$ 537,125
Beginning balance (NCI) at Dec. 31, 2017							$ 0
Beginning balance (Parent) at Dec. 31, 2017		$ 4	$ 387,145	$ (431)	$ 141,186	$ 537,125		$ 9,221
Net Income (Loss), Total	11,362
Net Income (Loss), Parent	11,361	0	0	0	11,361	11,361		0
Net Income (Loss), NCI	1						1
Other Comprehensive Income (Loss), Parent		$ 0	0	0	0	(13,585)		(13,585)
Other Comprehensive Income (Loss), NCI							0
Other Comprehensive Income (Loss), Total	(13,585)
Stock Issued During Period, Shares, Shares-based Compensation, Gross		157,525
Stock Issued During Period, Value, Restricted Stock Award, Gross	1,675	$ 0	1,675	0	0	1,675	0	0
Cash dividends on common stock	(7,699)	$ 0	0	0	(7,699)	(7,699)	0	0
Investment in Subsidiary - NCI	20,000						20,000
Ending Balance (shares) at Sep. 30, 2018		42,910,579
Ending Balance (Total) at Sep. 30, 2018	548,878
Ending Balance (Parent) at Sep. 30, 2018		$ 4	388,820	(431)	154,186	528,877		(13,702)
Ending balance (NCI) at Sep. 30, 2018							20,001
Beginning balance (shares) at Jun. 30, 2018		42,822,187
Beginning balance (Total) at Jun. 30, 2018	544,734
Beginning balance (NCI) at Jun. 30, 2018							0
Beginning balance (Parent) at Jun. 30, 2018		$ 4	388,193	(431)	168,461	544,734		(11,493)
Net Income (Loss), Total	(11,707)
Net Income (Loss), Parent	(11,708)	0	0	0	(11,708)	(11,708)		0
Net Income (Loss), NCI	1						1
Other Comprehensive Income (Loss), Parent		$ 0	0	0	0	(2,209)		(2,209)
Other Comprehensive Income (Loss), NCI							0
Other Comprehensive Income (Loss), Total	(2,209)
Stock Issued During Period, Shares, Shares-based Compensation, Gross		88,392
Stock Issued During Period, Value, Restricted Stock Award, Gross	627	$ 0	627	0	0	627	0	0
Cash dividends on common stock	(2,569)	$ 0	0	0	(2,569)	(2,569)	0	0
Investment in Subsidiary - NCI	20,000						20,000
Ending Balance (shares) at Sep. 30, 2018		42,910,579
Ending Balance (Total) at Sep. 30, 2018	$ 548,878
Ending Balance (Parent) at Sep. 30, 2018		$ 4	388,820	(431)	154,186	528,877		(13,702)
Ending balance (NCI) at Sep. 30, 2018							20,001
Reclassification due to adoption of ASU 2016-01 | Accounting Standards Update 2016-01 [Member]					9,338			(9,338)
Beginning balance (shares) at Dec. 31, 2018	42,984,578	42,984,578
Beginning balance (Total) at Dec. 31, 2018	$ 540,369
Beginning balance (NCI) at Dec. 31, 2018	20,139						20,139
Beginning balance (Parent) at Dec. 31, 2018	520,230	$ 4	389,141	(431)	140,546	520,230		(9,030)
Net Income (Loss), Total	(21,434)
Net Income (Loss), Parent	(21,714)				(21,714)	(21,714)
Net Income (Loss), NCI	280						280
Other Comprehensive Income (Loss), Parent						22,744		22,744
Other Comprehensive Income (Loss), NCI							257
Other Comprehensive Income (Loss), Total	23,001
Stock Issued During Period, Shares, Shares-based Compensation, Gross		249,910
Stock Issued During Period, Value, Restricted Stock Award, Gross	2,292		2,292			2,292
Cash dividends on common stock	(7,710)				(7,710)	(7,710)
Investment in Subsidiary - NCI	$ 0
Ending Balance (shares) at Sep. 30, 2019	43,234,488	43,234,488
Ending Balance (Total) at Sep. 30, 2019	$ 536,518
Ending Balance (Parent) at Sep. 30, 2019	515,842	$ 4	391,433	(431)	111,122	515,842		13,714
Ending balance (NCI) at Sep. 30, 2019	20,676						20,676
Beginning balance (shares) at Jun. 30, 2019		43,231,184
Beginning balance (Total) at Jun. 30, 2019	562,488
Beginning balance (NCI) at Jun. 30, 2019							20,575
Beginning balance (Parent) at Jun. 30, 2019		$ 4	390,719	(431)	141,973	541,913		9,648
Net Income (Loss), Total	(28,215)
Net Income (Loss), Parent	(28,280)				(28,280)	(28,280)
Net Income (Loss), NCI	65						65
Other Comprehensive Income (Loss), Parent						4,066		4,066
Other Comprehensive Income (Loss), NCI							36
Other Comprehensive Income (Loss), Total	4,102
Stock Issued During Period, Shares, Shares-based Compensation, Gross		3,304
Stock Issued During Period, Value, Restricted Stock Award, Gross	714		714			714
Cash dividends on common stock	$ (2,571)				(2,571)	(2,571)
Ending Balance (shares) at Sep. 30, 2019	43,234,488	43,234,488
Ending Balance (Total) at Sep. 30, 2019	$ 536,518
Ending Balance (Parent) at Sep. 30, 2019	515,842	$ 4	$ 391,433	$ (431)	$ 111,122	$ 515,842		$ 13,714
Ending balance (NCI) at Sep. 30, 2019	$ 20,676						$ 20,676