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]	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						33,096,281
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				3,972		3,972	3,972
Common stock issued from option exercise, net of excess benefits	5		34	0	0	0	39
Common stock issued from option exercise, net of excess benefits (in shares)	5,000
Stock-based compensation	0		630	0	0	0	630
Other comprehensive income, net of reclassification adjustments and tax	0	0	0	0	2,113	2,113	2,113
Balance at Mar. 31, 2012	$ 33,201	$ (866)	$ 242,661	$ (5,305)	$ 8,542	$ 6,085	$ 278,233
Balance (in shares) at Mar. 31, 2012	33,201,281						33,101,281