Consolidated Statement of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2016	$ 294	$ 93,816	$ 122,052	$ 728	$ 216,890
Balance (in Shares) at Dec. 31, 2016	29,413
Stock-based compensation		7,266			7,266
Stock issued on vesting of RSUs	$ 5				5
Stock issued on vesting of RSUs (in Shares)	991
Taxes paid on vesting of RSUs		(3,209)			(3,209)
Taxes paid on vesting of RSUs (in Shares)	(449)
Dividends			(4,892)		(4,892)
Net income			33,076		33,076
Other				187	187
Balance at Dec. 31, 2017	$ 299	97,873	150,236	915	249,323
Balance (in Shares) at Dec. 31, 2017	29,955
Stock-based compensation		3,170			3,170
Stock issued on vesting of RSUs	$ 3				3
Stock issued on vesting of RSUs (in Shares)	345
Taxes paid on vesting of RSUs		(298)			(298)
Taxes paid on vesting of RSUs (in Shares)	(55)
Dividends			(4,942)		(4,942)
Net income			7,621		7,621
Other		(3)			(3)
Balance at Dec. 31, 2018	$ 302	$ 100,742	153,830		$ 254,874
Balance (in Shares) at Dec. 31, 2018	30,245
Impact from adoption of ASU 2018-02 and ASU 2016-01 (Note 1)			$ 915	$ (915)