Basis and Summary of Significant Accounting Policies - Components of Prepaid Expenses and Other Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Prepaid Expenses	$ 87,042	$ 75,485
Assets Held for Sale	11,925	8,866
Deferred Tax Asset	5,912	5,912
Income Tax Receivable	22,480	11,884
Other Assets	24,315	18,881
Prepaid Expenses and Other Assets	$ 151,674	$ 121,028