Interest and Debt Expense - Details of Interest and Debt Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest And Debt Expense [Abstract]
Interest expense	$ 33,472	$ 34,501	$ 101,463	$ 103,012
Amortization of deferred financing costs	2,320	2,824	6,957	8,450
Total interest and debt expense	$ 35,792	$ 37,325	$ 108,420	$ 111,462