Interest and Debt Expense - Details of Interest and Debt Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Interest And Debt Expense [Abstract]
Interest expense	$ 33,690	$ 34,388	$ 67,991	$ 68,511
Amortization of deferred financing costs	2,319	2,825	4,637	5,626
Total interest and debt expense	$ 36,009	$ 37,213	$ 72,628	$ 74,137