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Accrued Expenses (Schedule of Accrued Expenses) (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Accrued Expenses [Abstract]    
Salaries and benefits $ 21,397 $ 20,958
Real estate and property taxes 9,932 9,583
Unpaid capital expenditures 6,987 6,073
Other 30,339 26,417
Total accrued expenses $ 68,655 $ 63,031