Goodwill and Intangible Assets (Amortization Expense) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Aggregate amortization expense	$ 3,500,000	$ 1,900,000	$ 7,000,000	$ 3,800,000
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Remaining 2013	6,952,000		6,952,000
2014	13,291,000		13,291,000
2015	12,747,000		12,747,000
2016	12,126,000		12,126,000
2017	$ 11,763,000		$ 11,763,000