Accrued Expenses (Schedule of Accrued Expenses) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accrued Expenses [Abstract]
Salaries and benefits	$ 19,838	$ 16,015
Real estate and property taxes	9,598	7,928
Unpaid capital expenditures	14,669	12,387
Other	23,513	27,335
Total accrued expenses	$ 67,618	$ 63,665