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 [Member]
Beginning Balance at Dec. 31, 2017	$ 296,608	$ 1,828	$ 220,591	$ 70,402	$ 3,787
Balance, Shares at Dec. 31, 2017		18,278,833
Cumulative effect adjustment from adoption | ASU 2014-09 [Member]	4,761			4,761
Cumulative effect adjustment from adoption | ASU 2016-16 [Member]	(1,896)			(1,896)
Net income	5,226			5,226
Other comprehensive income (loss), net of tax	697				697
Share-based compensation	3,916		3,916
Common shares issued, net	3,862	$ 13	3,849
Common shares issued, net, Shares		126,511
Ending Balance at Mar. 31, 2018	313,174	$ 1,841	228,356	78,493	4,484
Balance, Shares at Mar. 31, 2018		18,405,344
Beginning Balance at Dec. 31, 2017	296,608	$ 1,828	220,591	70,402	3,787
Balance, Shares at Dec. 31, 2017		18,278,833
Net income	6,151
Other comprehensive income (loss), net of tax	1,050
Ending Balance at Jun. 30, 2018	319,846	$ 1,849	233,742	79,418	4,837
Balance, Shares at Jun. 30, 2018		18,485,788
Beginning Balance at Mar. 31, 2018	313,174	$ 1,841	228,356	78,493	4,484
Balance, Shares at Mar. 31, 2018		18,405,344
Net income	925			925
Other comprehensive income (loss), net of tax	353				353
Share-based compensation	5,215		5,215
Common shares issued, net	179	$ 8	171
Common shares issued, net, Shares		80,444
Ending Balance at Jun. 30, 2018	319,846	$ 1,849	233,742	79,418	4,837
Balance, Shares at Jun. 30, 2018		18,485,788
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	18,579,688
Cumulative effect adjustment from adoption | ASU 2016-02 [Member]	$ 71			71
Cumulative effect adjustment from adoption | ASU 2018-02 [Member]				(938)	938
Net income	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	18,579,688
Cumulative effect adjustment from adoption | ASU 2018-02 [Member]	$ 938
Net income	350
Other comprehensive income (loss), net of tax	(2,772)
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	18,831,581
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	(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	18,831,581