Accounting Policies - Schedule of Error Corrections and Prior Period Adjustments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest income
Loans receivable	$ 63,003	$ 45,517	$ 178,961	$ 122,641
Total interest income	80,125	61,496	228,791	168,846
Net interest income	42,090	51,861	133,487	150,736
Net interest income after credit loss expense (recovery)	41,827	52,462	132,302	152,483
Non–interest expense
Loan expense	1,120	1,392	3,635	4,130
Total non–interest expense	36,168	36,816	106,954	107,490
Net income	$ 16,205	23,821	53,196	72,243
Operating Activities
Net change in other assets			(1,048)	(4,491)
Net cash provided by operating activities			73,956	82,959
Investing activities
Net change in loans			(105,373)	(375,651)
Net cash used in investing activities			(55,748)	(907,622)
Net Change in Cash and Cash Equivalents			51,632	(483,849)
Additional Supplemental Information
Transfer of available for sale securities to held to maturity securities			$ 0	120,881
As Reported
Interest income
Loans receivable		47,051		126,479
Total interest income		63,030		172,684
Net interest income		53,395		154,574
Net interest income after credit loss expense (recovery)		53,996		156,321
Non–interest expense
Loan expense		2,926		7,968
Total non–interest expense		38,350		111,328
Net income		23,821		72,243
Operating Activities
Net change in other assets				(12,865)
Net cash provided by operating activities				77,664
Investing activities
Net change in loans				(370,251)
Net cash used in investing activities				(902,327)
Net Change in Cash and Cash Equivalents				(483,849)
Indirect Loan Dealer Reserve Adjustment
Interest income
Loans receivable		(1,534)		(3,838)
Total interest income		(1,534)		(3,838)
Net interest income		(1,534)		(3,838)
Net interest income after credit loss expense (recovery)		(1,534)		(3,838)
Non–interest expense
Loan expense		(1,534)		(3,838)
Total non–interest expense		(1,534)		(3,838)
Operating Activities
Net change in other assets				5,400
Net cash provided by operating activities				5,400
Investing activities
Net change in loans				(5,400)
Net cash used in investing activities				(5,400)
Transfer of AFS Securities to HTM Securities
Additional Supplemental Information
Transfer of available for sale securities to held to maturity securities				120,881
As Revised
Interest income
Loans receivable		45,517		122,641
Total interest income		61,496		168,846
Net interest income		51,861		150,736
Net interest income after credit loss expense (recovery)		52,462		152,483
Non–interest expense
Loan expense		1,392		4,130
Total non–interest expense		36,816		107,490
Net income		$ 23,821		72,243
Operating Activities
Net change in other assets				(7,465)
Net cash provided by operating activities				83,064
Investing activities
Net change in loans				(375,651)
Net cash used in investing activities				(907,727)
Net Change in Cash and Cash Equivalents				(483,849)
Additional Supplemental Information
Transfer of available for sale securities to held to maturity securities				$ 120,881