Condensed Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Shares [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Dec. 31, 2018	$ 335,397	$ 1,858	$ 243,165	$ 87,078	$ 3,296
Balance, Shares at Dec. 31, 2018		18,579,688
Cumulative effect adjustment from adoption | ASU 2018-02 [Member]				(938)	938
Cumulative effect adjustment from adoption | ASU 2016-02 [Member]	71			71
Net income (loss)	897			897
Other comprehensive income (loss), net of tax	(2,401)				(2,401)
Share-based compensation	5,685		5,685
Common shares issued, net	4,033	$ 21	4,012
Common shares issued, net, Shares		211,081
Ending Balance at Mar. 31, 2019	343,682	$ 1,879	252,862	87,108	1,833
Balance, Shares at Mar. 31, 2019		18,790,769
Beginning Balance at Dec. 31, 2018	335,397	$ 1,858	243,165	87,078	3,296
Balance, Shares at Dec. 31, 2018		18,579,688
Net income (loss)	(40,148)
Other comprehensive income (loss), net of tax	(8,815)
Ending Balance at Sep. 30, 2019	306,434	$ 1,888	263,064	46,063	(4,581)
Balance, Shares at Sep. 30, 2019		18,875,184
Beginning Balance at Mar. 31, 2019	343,682	$ 1,879	252,862	87,108	1,833
Balance, Shares at Mar. 31, 2019		18,790,769
Net income (loss)	(547)			(547)
Other comprehensive income (loss), net of tax	(371)				(371)
Share-based compensation	5,849		5,849
Common shares issued, net	(819)	$ 4	(823)
Common shares issued, net, Shares		40,812
Ending Balance at Jun. 30, 2019	347,794	$ 1,883	257,888	86,561	1,462
Balance, Shares at Jun. 30, 2019		18,831,581
Net income (loss)	(40,498)			(40,498)
Other comprehensive income (loss), net of tax	(6,043)				(6,043)
Share-based compensation	5,844		5,844
Common shares issued, net	(663)	$ 5	(668)
Common shares issued, net, Shares		43,603
Ending Balance at Sep. 30, 2019	306,434	$ 1,888	263,064	46,063	(4,581)
Balance, Shares at Sep. 30, 2019		18,875,184
Beginning Balance at Dec. 31, 2019	$ 327,631	$ 1,902	271,019	57,749	(3,039)
Balance, Shares at Dec. 31, 2019	19,022,619	19,022,619
Cumulative effect adjustment from adoption | ASU 2016-13 [Member]	$ (887)			(887)
Net income (loss)	25,665			25,665
Other comprehensive income (loss), net of tax	(1,711)				(1,711)
Share-based compensation	3,859		3,859
Common shares issued, net	812	$ 4	808
Common shares issued, net, Shares		33,559
Ending Balance at Mar. 31, 2020	355,369	$ 1,906	275,686	82,527	(4,750)
Balance, Shares at Mar. 31, 2020		19,056,178
Beginning Balance at Dec. 31, 2019	$ 327,631	$ 1,902	271,019	57,749	(3,039)
Balance, Shares at Dec. 31, 2019	19,022,619	19,022,619
Net income (loss)	$ 11,895
Other comprehensive income (loss), net of tax	2,048
Ending Balance at Sep. 30, 2020	$ 354,896	$ 1,927	285,203	68,757	(991)
Balance, Shares at Sep. 30, 2020	19,267,420	19,267,420
Beginning Balance at Mar. 31, 2020	$ 355,369	$ 1,906	275,686	82,527	(4,750)
Balance, Shares at Mar. 31, 2020		19,056,178
Net income (loss)	(18,424)			(18,424)
Other comprehensive income (loss), net of tax	1,484				1,484
Share-based compensation	4,699		4,699
Common shares issued, net	1,917	$ 15	1,902
Common shares issued, net, Shares		152,885
Ending Balance at Jun. 30, 2020	345,045	$ 1,921	282,287	64,103	(3,266)
Balance, Shares at Jun. 30, 2020		19,209,063
Net income (loss)	4,654			4,654
Other comprehensive income (loss), net of tax	2,275				2,275
Share-based compensation	3,841		3,841
Common shares issued, net	(919)	$ 6	(925)
Common shares issued, net, Shares		58,357
Ending Balance at Sep. 30, 2020	$ 354,896	$ 1,927	$ 285,203	$ 68,757	$ (991)
Balance, Shares at Sep. 30, 2020	19,267,420	19,267,420