Financial Instruments and Fair Values - Gain and Loss of Cash Flow Hedges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain recognized in other comprehensive income (loss)	$ 5,581	$ 40,044	$ 348
Amount of loss (gain) reclassified from accumulated other comprehensive income (loss) into interest expense	(7,819)	7,230	11,653
Interest expense	(101,484)	(101,206)	(94,394)
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain recognized in other comprehensive income (loss)	5,581	40,044	348
Amount of loss (gain) reclassified from accumulated other comprehensive income (loss) into interest expense	7,819	(7,230)	(11,653)
Interest rate swaps | Reclassification out of Accumulated Other Comprehensive Income | Accumulated other comprehensive income (loss)
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense	$ 7,819	$ (7,230)	$ (11,653)