Income Taxes (Total Income Tax Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes
Income from continuing operations	$ 35,841	$ 33,791	$ 34,347
Discontinued operations	2,164	(593)	1,627
Shareholders' equity	(649)	(71)	(2)
Other comprehensive income	332	860	646
Total	$ 37,688	$ 33,987	$ 36,618