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, 2017	$ 299	$ 97,873	$ 150,236	$ 915	$ 249,323
Balance (in Shares) at Dec. 31, 2017	29,955
Stock-based compensation		2,755			2,755
Stock issued on vesting of RSUs	$ 2				2
Stock issued on vesting of RSUs (in Shares)	223
Taxes paid on vesting of RSUs		(11)			(11)
Taxes paid on vesting of RSUs (in Shares)	(1)
Dividends			(3,707)		(3,707)
Net income			5,023		5,023
Balance at Sep. 30, 2018	$ 301	100,617	152,467		253,385
Balance (in Shares) at Sep. 30, 2018	30,177
Balance at Jun. 30, 2018	$ 301	100,228	150,789		251,318
Balance (in Shares) at Jun. 30, 2018	30,177
Stock-based compensation		389			389
Dividends			(1,236)		(1,236)
Net income			2,914		2,914
Balance at Sep. 30, 2018	$ 301	100,617	152,467		253,385
Balance (in Shares) at Sep. 30, 2018	30,177
Impact from adoption of ASU 2018-02 and ASU 2016-01 (Note 1)			915	$ (915)
Balance at Dec. 31, 2018	$ 302	100,742	153,830		254,874
Balance (in Shares) at Dec. 31, 2018	30,245
Stock-based compensation		1,438			1,438
Stock issued on vesting of RSUs (in Shares)	7
Taxes paid on vesting of RSUs		(14)			(14)
Taxes paid on vesting of RSUs (in Shares)	(3)
Dividends			(3,724)		(3,724)
Net income			(67)		(67)
Balance at Sep. 30, 2019	$ 302	102,166	150,039		252,507
Balance (in Shares) at Sep. 30, 2019	30,249
Balance at Jun. 30, 2019	$ 302	101,747	155,003		257,052
Balance (in Shares) at Jun. 30, 2019	30,247
Stock-based compensation		426			426
Stock issued on vesting of RSUs (in Shares)	3
Taxes paid on vesting of RSUs		(7)			(7)
Taxes paid on vesting of RSUs (in Shares)	(1)
Dividends			(1,241)		(1,241)
Net income			(3,723)		(3,723)
Balance at Sep. 30, 2019	$ 302	$ 102,166	$ 150,039		$ 252,507
Balance (in Shares) at Sep. 30, 2019	30,249