Goodwill and Identifiable Assets (Future Amortization Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 9,742	$ 11,325	$ 29,918	$ 23,151
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2016	9,724		9,724
2017	33,026		33,026
2018	28,903		28,903
2019	22,010		22,010
2020	14,500		14,500
Thereafter	34,179		34,179
Net Carrying Amount	$ 142,342		$ 142,342		$ 172,295