Goodwill and Other Intangible Assets (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2010 Velocitude [Member]	Jun. 30, 2010 Velocitude [Member]
Business Acquisition [Line Items]
Goodwill				$ 11,600,000	$ 11,600,000
Identifiable intangible assets				2,800,000	2,800,000
Amortization of other intangible assets	17,070,000	16,657,000	16,722,000
Future Amortization Expense 2012	16,600,000
Future amortization expense 2013	13,200,000
Future amortization expense 2014	7,200,000
Future amortization expense 2015	4,600,000
Future amortization expense 2016	$ 2,100,000