Intangible Assets (Schedule of Amortization and Future Amortization Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Amortization expense on intangible assets	$ 4,154	$ 3,147	$ 8,191	$ 6,292
Estimated amortization expense, remainder of 2015	9,761		9,761
Estimated amortization expense, 2016	15,628		15,628
Estimated amortization expense, 2017	14,465		14,465
Estimated amortization expense, 2018	12,349		12,349
Estimated amortization expense, 2019	$ 8,036		$ 8,036