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Accounts Payable and Accrued Expenses (Tables)
6 Months Ended
Jun. 30, 2021
Payables and Accruals [Abstract]  
Accounts payable and accrued expenses Accounts payable and accrued expenses consisted of the following as of June 30, 2021 and December 31, 2020 (amounts in thousands):
June 30, 2021December 31, 2020
Accrued capital expenditures$52,891 $58,057 
Accounts payable and accrued expenses26,012 32,309 
Interest rate swap agreements liability6,176 8,849 
Accrued interest payable3,392 3,219 
Due to affiliated companies783 769 
     Total accounts payable and accrued expenses$89,254 $103,203