UNAUDITED CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Common stock [Member]	Treasury stock [Member]	Additional paid-in capital [Member]	Accumulated deficit [Member]	Accumulated other comprehensive income [Member]	Total
Balance at Dec. 31, 2011	$ 33,196	$ (866)	$ 241,997	$ (9,277)	$ 6,429	$ 271,479
Balance (in shares) at Dec. 31, 2011	33,196,281
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				7,826		7,826
Common stock issued from option exercise, net of excess benefits	5		34			39
Common stock issued from option exercise, net of excess benefits (in shares)	5,000
Stock-based compensation			1,253			1,253
Other comprehensive income, net of reclassification adjustments and tax					2,277	2,277
Balance at Jun. 30, 2012	$ 33,201	$ (866)	$ 243,284	$ (1,451)	$ 8,706	$ 282,874
Balance (in shares) at Jun. 30, 2012	33,201,281