Accrued Expenses and Other Current Liabilities (Schedule of Accrued Expenses and Other Current Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounts Payable and Accrued Liabilities, Current [Abstract]
Accrued compensation and employee benefits	$ 184,286	$ 158,142
Other accrued expenses	133,182	139,937
Total	$ 317,468	$ 298,079