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]	Retained earnings (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				11,387		11,387
Common stock issued from option exercises, net of tax benefits	13		85			98
Common stock issued from option exercises, net of tax benefits (in shares)	12,500
Stock-based compensation			1,872			1,872
Other comprehensive income, net of reclassification adjustments and tax					4,149	4,149
Balance at Sep. 30, 2012	$ 33,209	$ (866)	$ 243,954	$ 2,110	$ 10,578	$ 288,985
Balance (in shares) at Sep. 30, 2012	33,208,781