Investment Securities - Schedule of Gross Gains and Gross Losses Realized and Impairment on Investment Securities (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Realized gains on investment securities	$ 225,000	$ 15,000	$ 836,000	$ 280,000
Realized losses on investment securities	(9,000)	(4,000)	(60,000)	(18,000)
Net realized gains on investment securities	216,000	11,000	776,000	262,000
Unrealized gains on equity securities with readily determinable fair value	10,000	45,000	2,984,000	227,000
Unrealized losses on equity securities with readily determinable fair value	(2,094,000)	(3,154,000)	(4,230,000)	(9,809,000)
Net unrealized losses on equity securities with readily determinable fair value	(2,084,000)	(3,109,000)	(1,246,000)	(9,582,000)
Upward adjustments of equity securities without readily determinable fair values	0	0	0	0
Downward adjustments of equity securities without readily determinable fair values	0	0	0	0
Impairment of equity securities without readily determinable fair values	(489,000)	(5,000)	(489,000)	(4,362,000)
Adjustment and impairment, net, of equity securities without readily determinable fair values	(489,000)	(5,000)	(489,000)	(4,362,000)
Losses on investment securities, net	(2,357,000)	(3,103,000)	(959,000)	(13,682,000)
Proceeds from sales of equity securities with readily determinable fair value	0	3,000,000	23,592,000	21,753,000
Proceeds from sales and capital distributions of equity securities without readily determinable fair value	$ 0	$ 703,000	$ 67,000	$ 1,232,000