Income Taxes - Provision and Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current:
Federal	$ 0	$ 0	$ 0
State	(106)	385	680
Foreign	503	233	350
Current tax	397	618	1,030
Deferred:
Foreign	(1,895)	(817)	(1,971)
Deferred tax	(1,895)	(817)	(1,971)
Income tax provision (benefit)	$ (1,498)	$ (199)	$ (941)
Effective Income Tax Rate Reconciliation, Percent
Taxes at statutory U.S. federal income tax rate	21.00%	21.00%	21.00%
Nontaxable income of SVC	(21.00%)	(21.00%)	(21.00%)
State and local income taxes, net of federal tax benefit	0.30%	(0.30%)	(0.10%)
Foreign taxes	(6.90%)	0.40%	0.30%
Foreign tax rate change	11.00%	0.00%	0.00%
Effective tax rate	4.40%	0.10%	0.20%