Income Taxes (Total Income Tax Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes
Income from continuing operations	$ 42,627	$ 35,254	$ 32,991
Discontinued operations	1,311	2,751	207
Shareholders' equity	(1,581)	(649)	(71)
Other comprehensive income	0	332	860
Total	$ 42,357	$ 37,688	$ 33,987