Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Reclassification [Line Items]
Interest income, operating	$ 3,690	$ 3,490	$ 10,823	$ 10,410
Revenues	166,011	126,257	476,125	312,959
Operating income	$ 22,342	54,076	$ 66,457	109,849
Revision of Prior Period, Reclassification, Adjustment
Reclassification [Line Items]
Interest income, operating		3,500		10,400
Interest income, nonoperating		(3,500)		(10,400)
Revenues		3,500		10,400
Operating income		$ 3,500		$ 10,400