Condensed Consolidated Statement of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Total
Balance at Dec. 31, 2016	$ 115	$ 179,958	$ (35,218)	$ 160,059	$ 304,914
Balance (in shares) at Dec. 31, 2016	11,513,279
Cumulative effect of adoption of new accounting standard for stock compensation				550	550
Stock based compensation		567			567
Common stock issued for stock compensation plans, net of shares withheld and withholding paid for employee taxes	$ 1	(96)			(95)
Common stock issued for stock compensation plans, net of shares withheld and withholding paid for employee taxes (in shares)	74,684
Net loss				(1,952)	(1,952)
Other comprehensive (loss) income, net of tax			13,062		13,062
Balance at Mar. 31, 2017	$ 116	180,429	(22,156)	158,657	317,046
Balance (in shares) at Mar. 31, 2017	11,587,963
Balance at Dec. 31, 2017	$ 116	182,689	(15,964)	53,368	220,209
Balance (in shares) at Dec. 31, 2017	11,587,963
Cumulative effect of adoption of new accounting standard for stock compensation				4,059	4,059
Stock based compensation		572			572
Common stock issued for stock compensation plans, net of shares withheld and withholding paid for employee taxes		(715)			(715)
Common stock issued for stock compensation plans, net of shares withheld and withholding paid for employee taxes (in shares)	47,153
Net loss				(5,736)	(5,736)
Other comprehensive (loss) income, net of tax			(89)		(89)
Balance at Mar. 31, 2018	$ 116	$ 182,546	$ (16,053)	$ 51,691	$ 218,300
Balance (in shares) at Mar. 31, 2018	11,635,116