Intangible Assets (Schedule of Amortization and Future Amortization Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Amortization expense on intangible assets	$ 5,872	$ 5,992
Estimated amortization expense, remainder of 2017	17,733
Estimated amortization expense, 2018	21,502
Estimated amortization expense, 2019	17,167
Estimated amortization expense, 2020	16,249
Estimated amortization expense, 2021	$ 10,622