Prepaid and Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Income Taxes Receivable	$ 16,241	$ 7,908
Prepaid expenses	22,104	18,900
Deferred compensation plan assets	23,530	16,623
Other	12,690	32,340
Total prepaid and other current assets	$ 74,565	$ 75,771