Accrued Expenses (Schedule of Accrued Expenses) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accrued Expenses [Abstract]
Salaries and benefits	$ 18,759	$ 19,838
Real estate and property taxes	11,841	9,598
Unpaid capital expenditures	7,026	14,669
Other	24,897	23,513
Total accrued expenses	$ 62,523	$ 67,618