Goodwill and Intangible Assets (Amortization Expense) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Aggregate amortization expense	$ 3,400,000	$ 1,900,000	$ 10,400,000	$ 5,700,000
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Remaining 2013	3,363,000		3,363,000
2014	12,684,000		12,684,000
2015	12,140,000		12,140,000
2016	11,515,000		11,515,000
2017	$ 11,150,000		$ 11,150,000