Income Taxes (Schedule of Non-Current Income Taxes Receivable and Deferred) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Line Items]
Deferred income taxes	$ 105,792	$ 59,022
Taxes receivable	3,153	10,518
Total noncurrent income taxes receivable and deferred	$ 108,945	$ 69,540