Intangible Assets - Finite-lived Intangible Assets Roll Forward (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Finite-lived Intangible Assets
Finite-lived intangible assets, beginning of period			$ 35,240	$ 35,240	$ 35,240
Additions			0
Total finite-lived intangible assets, end of period	$ 35,240		35,240		35,240
Accumulated Amortization
Accumulated amortization, beginning of period			(34,815)	(33,576)	(33,576)
Current year amortization	(59)	$ (309)	(383)	$ (929)	(1,239)
Total accumulated amortization	(35,198)		(35,198)		(34,815)
Net intangible assets
Net finite-lived intangible assets, end of period	42		42		425
Infinite-lived intangible assets	6,892		6,892		6,892
Total net intangible assets	$ 6,934		$ 6,934		$ 7,317