Loans and Leases Held for Investment, Net of Allowance For Loan and Lease Losses - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Term Loans and Leases by Origination Year
Total	$ 4,806,927	$ 2,899,126
Consumer Portfolio Segment
Term Loans and Leases by Origination Year
Year 1	2,648,189	1,904,265
Year 2	1,275,082	37,620
Year 3	33,680	26,798
Year 4	24,398	9,906
Year 5	4,577	3,407
Prior	34,872	38,645
Within Revolving Period		1,275
Total	4,020,798	2,021,916
Consumer Portfolio Segment | Unsecured personal
Term Loans and Leases by Origination Year
Year 1	2,470,482	1,804,578
Year 2	1,171,772	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	0	0
Within Revolving Period		0
Total	3,642,254	1,804,578
Consumer Portfolio Segment | Residential mortgages
Term Loans and Leases by Origination Year
Year 1	43,130	36,732
Year 2	59,682	37,620
Year 3	33,680	26,798
Year 4	21,835	7,277
Year 5	4,577	3,025
Prior	34,872	38,645
Within Revolving Period		1,265
Total	197,776	151,362
Consumer Portfolio Segment | Secured consumer
Term Loans and Leases by Origination Year
Year 1	134,577	62,955
Year 2	43,628	0
Year 3	0	0
Year 4	2,563	2,629
Year 5	0	382
Prior	0	0
Within Revolving Period		10
Total	180,768	65,976
Commercial Portfolio Segment
Term Loans and Leases by Origination Year
Year 1	178,181	350,952
Year 2	233,209	208,693
Year 3	120,599	110,640
Year 4	96,489	70,150
Year 5	62,059	47,320
Prior	95,592	88,769
Within Revolving Period		686
Total	786,129	877,210
Commercial Portfolio Segment | Equipment finance
Term Loans and Leases by Origination Year
Year 1	55,947	53,971
Year 2	45,051	35,398
Year 3	28,066	28,728
Year 4	21,748	16,060
Year 5	12,931	6,184
Prior	3,704	8,814
Within Revolving Period		0
Total	167,447	149,155
Commercial Portfolio Segment | Equipment finance | Pass
Term Loans and Leases by Origination Year
Year 1	55,947	52,440
Year 2	42,853	35,398
Year 3	28,066	26,918
Year 4	20,145	15,457
Year 5	12,751	6,184
Prior	3,704	8,814
Within Revolving Period		0
Total	163,466	145,211
Commercial Portfolio Segment | Equipment finance | Special mention
Term Loans and Leases by Origination Year
Year 1	0	1,531
Year 2	2,198	0
Year 3	0	1,810
Year 4	1,603	0
Year 5	0	0
Prior	0	0
Within Revolving Period		0
Total	3,801	3,341
Commercial Portfolio Segment | Equipment finance | Substandard
Term Loans and Leases by Origination Year
Year 1	0	0
Year 2	0	0
Year 3	0	0
Year 4	0	603
Year 5	180	0
Prior	0	0
Within Revolving Period		0
Total	180	603
Commercial Portfolio Segment | Equipment finance | Doubtful
Term Loans and Leases by Origination Year
Year 1	0	0
Year 2	0	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	0	0
Within Revolving Period		0
Total	0	0
Commercial Portfolio Segment | Equipment finance | Loss
Term Loans and Leases by Origination Year
Year 1	0	0
Year 2	0	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	0	0
Within Revolving Period		0
Total	0	0
Commercial Portfolio Segment | Commercial real estate
Term Loans and Leases by Origination Year
Year 1	84,608	55,613
Year 2	56,575	63,599
Year 3	59,400	54,737
Year 4	53,887	43,843
Year 5	42,586	23,384
Prior	75,350	69,223
Within Revolving Period		0
Total	372,406	310,399
Commercial Portfolio Segment | Commercial real estate | Pass
Term Loans and Leases by Origination Year
Year 1	84,608	55,613
Year 2	56,575	55,202
Year 3	50,985	54,460
Year 4	52,967	39,981
Year 5	38,941	22,366
Prior	63,589	57,235
Within Revolving Period		0
Total	347,665	284,857
Commercial Portfolio Segment | Commercial real estate | Special mention
Term Loans and Leases by Origination Year
Year 1	0	0
Year 2	0	8,397
Year 3	8,415	0
Year 4	262	1,366
Year 5	1,242	1,018
Prior	842	7,242
Within Revolving Period		0
Total	10,761	18,023
Commercial Portfolio Segment | Commercial real estate | Substandard
Term Loans and Leases by Origination Year
Year 1	0	0
Year 2	0	0
Year 3	0	277
Year 4	658	2,496
Year 5	2,403	0
Prior	10,364	4,179
Within Revolving Period		0
Total	13,425	6,952
Commercial Portfolio Segment | Commercial real estate | Doubtful
Term Loans and Leases by Origination Year
Year 1	0	0
Year 2	0	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	0	0
Within Revolving Period		0
Total	0	0
Commercial Portfolio Segment | Commercial real estate | Loss
Term Loans and Leases by Origination Year
Year 1	0	0
Year 2	0	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	555	567
Within Revolving Period		0
Total	555	567
Commercial Portfolio Segment | Commercial and industrial
Term Loans and Leases by Origination Year
Year 1	37,626	241,368
Year 2	131,583	109,696
Year 3	33,133	27,175
Year 4	20,854	10,247
Year 5	6,542	17,752
Prior	16,538	10,732
Within Revolving Period		686
Total	246,276	417,656
Commercial Portfolio Segment | Commercial and industrial | Pass
Term Loans and Leases by Origination Year
Year 1	37,626	241,368
Year 2	126,661	108,574
Year 3	26,382	24,106
Year 4	15,190	7,874
Year 5	4,702	14,756
Prior	12,710	8,058
Within Revolving Period		599
Total	223,271	405,335
Commercial Portfolio Segment | Commercial and industrial | Special mention
Term Loans and Leases by Origination Year
Year 1	0	0
Year 2	176	0
Year 3	1,962	2,207
Year 4	1,852	463
Year 5	166	1,467
Prior	473	40
Within Revolving Period		0
Total	4,629	4,177
Commercial Portfolio Segment | Commercial and industrial | Substandard
Term Loans and Leases by Origination Year
Year 1	0	0
Year 2	4,746	1,122
Year 3	4,678	862
Year 4	3,812	1,858
Year 5	1,668	1,525
Prior	1,839	1,571
Within Revolving Period		87
Total	16,743	7,025
Commercial Portfolio Segment | Commercial and industrial | Doubtful
Term Loans and Leases by Origination Year
Year 1	0	0
Year 2	0	0
Year 3	111	0
Year 4	0	0
Year 5	0	0
Prior	287	0
Within Revolving Period		0
Total	398	0
Commercial Portfolio Segment | Commercial and industrial | Loss
Term Loans and Leases by Origination Year
Year 1	0	0
Year 2	0	0
Year 3	0	0
Year 4	0	52
Year 5	6	4
Prior	1,229	1,063
Within Revolving Period		0
Total	1,235	1,119
Commercial Portfolio Segment | Commercial and industrial loan, PPP
Term Loans and Leases by Origination Year
Total	89,400	268,300
Current | Consumer Portfolio Segment | Unsecured personal
Term Loans and Leases by Origination Year
Year 1	2,458,166	1,796,678
Year 2	1,146,225	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	0	0
Within Revolving Period		0
Total	3,604,391	1,796,678
Current | Consumer Portfolio Segment | Residential mortgages
Term Loans and Leases by Origination Year
Year 1	43,130	36,732
Year 2	59,682	37,620
Year 3	33,680	26,798
Year 4	21,835	7,277
Year 5	4,573	2,682
Prior	34,539	37,685
Within Revolving Period		1,265
Total	197,439	150,059
Current | Consumer Portfolio Segment | Secured consumer
Term Loans and Leases by Origination Year
Year 1	133,644	62,731
Year 2	42,910	0
Year 3	0	0
Year 4	2,563	0
Year 5	0	0
Prior	0	0
Within Revolving Period		10
Total	179,117	62,741
Past due | Commercial Portfolio Segment
Term Loans and Leases by Origination Year
Total	2,203	2,123
Past due | Commercial Portfolio Segment | Equipment finance
Term Loans and Leases by Origination Year
Total	0	0
Past due | Commercial Portfolio Segment | Commercial real estate
Term Loans and Leases by Origination Year
Total	553	713
Past due | Commercial Portfolio Segment | Commercial and industrial
Term Loans and Leases by Origination Year
Total	1,650	1,410
30-59 days past due | Consumer Portfolio Segment | Unsecured personal
Term Loans and Leases by Origination Year
Year 1	5,758	3,624
Year 2	9,041	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	0	0
Within Revolving Period		0
Total	14,799	3,624
30-59 days past due | Consumer Portfolio Segment | Residential mortgages
Term Loans and Leases by Origination Year
Year 1	0	0
Year 2	0	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	0	142
Within Revolving Period		0
Total	0	142
30-59 days past due | Consumer Portfolio Segment | Secured consumer
Term Loans and Leases by Origination Year
Year 1	596	171
Year 2	389	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	0	0
Within Revolving Period		0
Total	985	171
30-59 days past due | Commercial Portfolio Segment
Term Loans and Leases by Origination Year
Total	0	104
30-59 days past due | Commercial Portfolio Segment | Equipment finance
Term Loans and Leases by Origination Year
Total	0	0
30-59 days past due | Commercial Portfolio Segment | Commercial real estate
Term Loans and Leases by Origination Year
Total	0	104
30-59 days past due | Commercial Portfolio Segment | Commercial and industrial
Term Loans and Leases by Origination Year
Total	0	0
60-89 days past due | Consumer Portfolio Segment | Unsecured personal
Term Loans and Leases by Origination Year
Year 1	4,038	2,600
Year 2	8,425	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	0	0
Within Revolving Period		0
Total	12,463	2,600
60-89 days past due | Consumer Portfolio Segment | Residential mortgages
Term Loans and Leases by Origination Year
Year 1	0	0
Year 2	0	0
Year 3	0	0
Year 4	0	0
Year 5	0	92
Prior	0	0
Within Revolving Period		0
Total	0	92
60-89 days past due | Consumer Portfolio Segment | Secured consumer
Term Loans and Leases by Origination Year
Year 1	270	53
Year 2	234	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	0	0
Within Revolving Period		0
Total	504	53
60-89 days past due | Commercial Portfolio Segment
Term Loans and Leases by Origination Year
Total	101	0
60-89 days past due | Commercial Portfolio Segment | Equipment finance
Term Loans and Leases by Origination Year
Total	0	0
60-89 days past due | Commercial Portfolio Segment | Commercial real estate
Term Loans and Leases by Origination Year
Total	101	0
60-89 days past due | Commercial Portfolio Segment | Commercial and industrial
Term Loans and Leases by Origination Year
Total	0	0
90 or more days past due | Consumer Portfolio Segment | Unsecured personal
Term Loans and Leases by Origination Year
Year 1	2,520	1,676
Year 2	8,081	0
Year 3	0	0
Year 4	0	0
Year 5	0	0
Prior	0	0
Within Revolving Period		0
Total	10,601	1,676
90 or more days past due | Consumer Portfolio Segment | Residential mortgages
Term Loans and Leases by Origination Year
Year 1	0	0
Year 2	0	0
Year 3	0	0
Year 4	0	0
Year 5	4	251
Prior	333	818
Within Revolving Period		0
Total	337	1,069
90 or more days past due | Consumer Portfolio Segment | Secured consumer
Term Loans and Leases by Origination Year
Year 1	67	0
Year 2	95	0
Year 3	0	0
Year 4	0	2,629
Year 5	0	382
Prior	0	0
Within Revolving Period		0
Total	162	3,011
90 or more days past due | Commercial Portfolio Segment
Term Loans and Leases by Origination Year
Total	2,102	2,019
90 or more days past due | Commercial Portfolio Segment | Equipment finance
Term Loans and Leases by Origination Year
Total	0	0
90 or more days past due | Commercial Portfolio Segment | Commercial real estate
Term Loans and Leases by Origination Year
Total	452	609
90 or more days past due | Commercial Portfolio Segment | Commercial and industrial
Term Loans and Leases by Origination Year
Total	$ 1,650	$ 1,410