Intangible Assets (Schedule of Amortization and Future Amortization Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Amortization expense on intangible assets	$ 5,992	$ 4,037
Estimated amortization expense, remainder of 2016	18,322
Estimated amortization expense, 2017	23,273
Estimated amortization expense, 2018	21,157
Estimated amortization expense, 2019	16,830
Estimated amortization expense, 2020	$ 15,929