Goodwill and Other Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Goodwill and Other Intangible Assets [Abstract]
Amortization of other intangible assets	$ 4,292,000	$ 4,152,000	$ 8,569,000	$ 8,260,000
Future amortization expense recognized in remainder of current year			8,300,000
Future amortization expense 2012			15,900,000
Future amortization expense 2013			13,100,000
Future amortization expense 2014			7,600,000
Future amortization expense 2015			$ 5,100,000