Condensed Consolidated Statement of Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Preferred Shares [Member]	Common Shares [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Shares [Member]
Stockholders' Equity, Beginning Balance at Dec. 31, 2011	$ 273,350	$ 96,325	$ 221	$ 139,943	$ 103,701	$ (66,840)
Shares Outstanding, Beginning Balance at Dec. 31, 2011		4,000	18,736,357
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	18				18
Stock options exercised, shares			90,813
Stock options exercised	740			(1,064)		1,804
Stock-based compensation expense	964			964
Deferral of executive and director compensation	74			74
Executive and director deferred compensation distributions shares			32,529
Executive and director deferred compensation distributions	0			(646)		646
Stockholders' Equity, Ending Balance at Jun. 30, 2012	$ 275,146	$ 96,325	$ 221	$ 139,271	$ 103,719	$ (64,390)
Shares Outstanding, Ending Balance at Jun. 30, 2012		4,000	18,859,699