Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Balance at beginning at Dec. 31, 2012	$ 21	$ 55,291	$ 104,252	$ (50,484)	$ 109,080
Balance at beginning (in shares) at Dec. 31, 2012	20,988,952			(3,089,453)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			$ 7,902		7,902
Exercise of stock options, net		$ (526)		$ 1,018	492
Exercise of stock options, net (in shares)				62,312
Excess tax benefit (deficiency)		39			39
Amortization of unearned stock compensation		900			900
Impact of forfeited vested options		(108)			$ (108)
Impact of forfeited restricted stock awards		232		$ (232)
Impact of forfeited restricted stock awards (in shares)				(14,165)
Issuance of restricted stock awards		$ (186)		$ 186
Issuance of restricted stock awards (in shares)				11,338
Impact of surrendered equity awards to satisfy taxes				$ (64)	$ (64)
Impact of surrendered equity awards to satisfy taxes (in shares)				(4,952)
Dividends on common stock			$ (7,547)		(7,547)
Balance at end at Dec. 31, 2013	$ 21	$ 55,642	104,607	$ (49,576)	110,694
Balance at end (in shares) at Dec. 31, 2013	20,988,952			(3,034,920)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			$ 14,972		14,972
Exercise of stock options, net		$ (116)		$ 297	181
Exercise of stock options, net (in shares)				18,500
Excess tax benefit (deficiency)		$ (10)			(10)
Repurchase of treasury shares				$ (6,980)	(6,980)
Repurchase of treasury shares (in shares)				(555,008)
Amortization of unearned stock compensation		$ 868			868
Impact of forfeited vested options		(72)			$ (72)
Impact of forfeited restricted stock awards		186		$ (186)
Impact of forfeited restricted stock awards (in shares)				(11,666)
Impact of released vested restricted stock units		(172)		$ 172
Impact of released vested restricted stock units (in shares)				10,709
Issuance of restricted stock awards		$ (1,455)		$ 1,455
Issuance of restricted stock awards (in shares)				91,448
Dividends on common stock			$ (8,346)		$ (8,346)
Balance at end at Dec. 31, 2014	$ 21	$ 54,871	111,233	$ (54,818)	$ 111,307
Balance at end (in shares) at Dec. 31, 2014	20,988,952			(3,480,937)	17,508,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			$ 2,044		$ 2,044
Exercise of stock options, net		$ (48)		$ 59	11
Exercise of stock options, net (in shares)				4,125
Excess tax benefit (deficiency)		$ (40)			(40)
Repurchase of treasury shares				$ (6,858)	(6,858)
Repurchase of treasury shares (in shares)				(865,922)
Amortization of unearned stock compensation		$ 886			886
Impact of forfeited vested options		(120)			$ (120)
Impact of forfeited restricted stock awards		784		$ (784)
Impact of forfeited restricted stock awards (in shares)				(52,128)
Impact of released vested restricted stock units		(224)		$ 224
Impact of released vested restricted stock units (in shares)				14,946
Issuance of restricted stock awards		$ (1,488)		$ 1,488
Issuance of restricted stock awards (in shares)				103,590
Dividends on common stock			$ (7,229)		$ (7,229)
Balance at end at Dec. 31, 2015	$ 21	$ 54,621	$ 106,048	$ (60,689)	$ 100,001
Balance at end (in shares) at Dec. 31, 2015	20,988,952			(4,276,326)