Condensed Consolidated Statement of Changes in Shareholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Accumulated Earnings	Accumulated Other Comprehensive Income
Beginning Balance at Dec. 31, 2012	$ 381,222	$ 195	$ (22,370)	$ 187,401	$ 213,017	$ 2,979
Beginning Balance, Shares at Dec. 31, 2012	18,255,226	19,513,476	(1,258,250)
Comprehensive income	8,306				8,851	(545)
Options exercised	855	1		854
Options exercised, Shares	95,000	95,000
Tax benefit from share-based payments	642			642
Restricted common stock issued	86			86
Restricted common stock issued, Shares		29,141
Share-based compensation	56			56
Dividends to stockholders	(1,469)				(1,469)
Ending Balance at Mar. 31, 2013	$ 389,698	$ 196	$ (22,370)	$ 189,039	$ 220,399	$ 2,434
Ending Balance, Shares at Mar. 31, 2013	18,379,367	19,637,617	(1,258,250)