Business and Summary of Significant Accounting Policies - Prepaid Expenses and Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Prepaid Expenses	$ 30,763	$ 31,509
Prepaid Insurance	27,948	36,735
Assets Held for Sale	6,589	10,118
Deferred Tax Asset	8,761	11,589
Other Assets	24,161	26,548
Prepaid Expense and Other Assets	$ 98,222	$ 116,499