Income Taxes (Schedule of Income Taxes Paid) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Paid, by Individual Jurisdiction [Line Items]
Income taxes paid, net of refunds		$ (142)	$ 7,236	$ 9,926
United States
Income Tax Paid, by Individual Jurisdiction [Line Items]
U.S. federal taxes paid, net of refunds		0	5,700	8,500
Massachusetts
Income Tax Paid, by Individual Jurisdiction [Line Items]
U.S. state taxes paid, net of refunds	[1]	0	1,300	1,225
Connecticut
Income Tax Paid, by Individual Jurisdiction [Line Items]
U.S. state taxes paid, net of refunds		(170)	0	0
New York
Income Tax Paid, by Individual Jurisdiction [Line Items]
U.S. state taxes paid, net of refunds		21	150	130
Other
Income Tax Paid, by Individual Jurisdiction [Line Items]
U.S. state taxes paid, net of refunds		$ 7	$ 86	$ 71

[1] Amounts separately stated for jurisdictions exceeding 5% of total income tax paid (net of refunds).