Significant Accounting Policies - Investment in Marketable Securities (Narrative) (Details)	12 Months Ended
	Dec. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) security	Dec. 31, 2021 USD ($) marketableSecurity
Real Estate [Line Items]
Allowance for loan loss	$ 0	$ 0	$ 0
Proceeds from sale of marketable securities	0	0	$ 7,800,000
Number of marketable securities sold | security			1
Proceeds from the repayment of debt marketable securities			$ 3,700,000
Number of securities repaid | security			1
Equity marketable securities	0	0
Number of securities sold | marketableSecurity				1
Proceeds from sale of equity marketable securities				$ 4,200,000
Marketable securities, realized loss			$ 6,500,000
Commercial mortgage-backed securities - available-for-sale
Real Estate [Line Items]
Cost basis of commercial mortgage backed securities	$ 18,300,000	11,500,000
Number of securities in unrealized gain position | security	1
Unrealized gain	$ 200,000
Fair market value	$ 5,500,000
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, number of positions | security	2
Unrealized loss	$ 1,500,000	1,900,000
Fair value of security in a continuous unrealized loss position for less than 12 months	$ 11,800,000	9,600,000
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, number of positions | security	1
Debt securities, held-to-maturity, amortized cost, after allowance for credit loss	$ 5,489,000	$ 0
Debt securities, held-to-maturity, amortized cost, discount	$ 200,000