Financial Instruments and Fair Values - Effect of Derivative Financial Instruments Designated as Cash Flow Hedges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain recognized in other comprehensive income (loss)	$ 9,525	$ 19,588	$ 16,058	$ 39,407
Amount of gain (loss) reclassified from accumulated other comprehensive income (loss) into interest expense	2,275	(1,392)	5,429	(7,428)
Interest expense	(25,382)	(25,516)	(76,091)	(75,572)
Interest rate swap
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain recognized in other comprehensive income (loss)	9,525	19,588	16,058	39,407
Amount of gain (loss) reclassified from accumulated other comprehensive income (loss) into interest expense	2,275	(1,392)	5,429	(7,428)
Interest rate swap | Reclassification out of accumulated other comprehensive income | Accumulated other comprehensive income (loss)
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	$ 2,275	$ (1,392)	$ 5,429	$ (7,428)