Accrued Expenses (Schedule of Accrued Expenses) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Accrued Expenses [Abstract]
Salaries and benefits	$ 14,864	$ 16,015
Real estate and property taxes	10,474	7,928
Unpaid capital expenditures	11,781	12,387
Other	26,032	27,335
Total accrued expenses	$ 63,151	$ 63,665