Shareholders' Equity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at the beginning of the period	$ 40,792	$ 34,668	$ 39,664	$ 31,735
Net income during the period	929	3,375	1,957	5,508
Treasury stock purchased	(292)	0	(384)	0
Stock-based compensation	65	48	176	131
Exercise of stock options	220	14	301	731
Balance at end of the period	$ 41,714	$ 38,105	$ 41,714	$ 38,105