Intangible Assets (Schedule of Amortization and Future Amortization Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Amortization expense on intangible assets	$ 3,147	$ 3,609	$ 6,292	$ 7,236
Estimated amortization expense, remainder of 2013	6,317		6,317
Estimated amortization expense, 2014	10,814		10,814
Estimated amortization expense, 2015	9,352		9,352
Estimated amortization expense, 2016	8,189		8,189
Estimated amortization expense, 2017	$ 7,268		$ 7,268