Goodwill and Intangible Assets Schedule of Goodwill (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Goodwill [Line Items]
Goodwill balance at January 1	$ 58,675	$ 33,002
Goodwill Impairment Charge	0	(8,343)
Goodwill, Allocation Adjustment	(228)	0
Additions as the result of acquisitions	2,697	34,016
Goodwill balance at December 31	$ 61,144	$ 58,675