Basis and Summary of Significant Accounting Policies - Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Accounts Payable	$ 48,172	$ 89,959
Accrued Insurance Costs	50,871	44,032
Accrued Salaries and Benefits	39,492	43,972
Accrued Real Estate and Sales Taxes	31,314	32,763
Other Accrued Expenses and Liabilities	55,913	62,090
Accounts Payable and Accrued Expenses	$ 225,762	$ 272,816