Income Taxes (Schedule of Non-Current Income Taxes Receivable and Deferred) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Deferred income taxes	$ 68,865	$ 105,792
Taxes receivable		3,153
Total noncurrent income taxes receivable and deferred	$ 68,865	$ 108,945