Consolidated Statements of Shareholders' Equity (USD $) In Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balances at Dec. 31, 2011	$ 13,047	$ 46	$ 10,105	$ 3,462	$ (566)
Net income	2,139			2,139
Unrealized gain (loss) on cash flow hedges, net of tax	8					8
Dividends paid on common stock	(6,682)			(6,682)
Increase in excess tax benefits related to stock-based compensation	58		58
Stock-based compensation expense	242		242
Stock options exercised	624	3	621
Purchase of treasury stock	(2,549)				(2,549)
Ending Balances at Dec. 31, 2012	6,887	49	11,026	(1,081)	(3,115)	8
Net income	3,805			3,805
Unrealized gain (loss) on cash flow hedges, net of tax	8					8
Dividends paid on common stock	(2,123)			(2,123)
Increase in excess tax benefits related to stock-based compensation	250		250
Stock-based compensation expense	517		517
Stock options exercised	132	1	131
Purchase of treasury stock	(16)				(16)
Ending Balances at Dec. 31, 2013	9,460	50	11,924	601	(3,131)	16
Net income	3,423			3,423
Unrealized gain (loss) on cash flow hedges, net of tax	(41)					(41)
Increase in excess tax benefits related to stock-based compensation	467		467
Stock-based compensation expense	330		330
Stock options exercised	13	1	12
Purchase of treasury stock	(784)				(784)
Ending Balances at Dec. 31, 2014	$ 12,868	$ 51	$ 12,733	$ 4,024	$ (3,915)	$ (25)