Prepaid and Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Income Taxes Receivable	$ 4,892	$ 28,694
Prepaid expenses	18,564	18,682
Deferred compensation plan assets	19,134	17,320
Deferred income taxes	21,228	22,462
Other	20,039	28,204
Total prepaid and other current assets	$ 83,857	$ 115,362