Segments - Schedule of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Interest income	$ 180,611	$ 115,834	$ 501,739	$ 307,863
Interest expense	91,201	31,948	246,010	66,264
Net interest income (loss)	89,410	83,886	255,729	241,599
Provision for loan and lease credit losses	10,279	14,169	42,328	21,272
Noninterest income	37,891	57,724	81,626	218,921
Noninterest expense	74,262	83,048	229,681	229,641
Income tax expense (benefit)	2,967	1,525	7,611	35,191
Net income	39,793	42,868	57,735	174,416
Total assets	10,950,460	9,314,650	10,950,460	9,314,650	$ 9,855,498
Operating Segments | Banking
Segment Reporting Information [Line Items]
Interest income	180,416	115,819	501,271	307,780
Interest expense	90,914	31,581	245,094	64,961
Net interest income (loss)	89,502	84,238	256,177	242,819
Provision for loan and lease credit losses	10,279	14,169	42,328	21,272
Noninterest income	35,730	27,268	74,215	64,371
Noninterest expense	69,480	78,474	215,879	216,652
Income tax expense (benefit)	3,084	1,344	7,785	10,152
Net income	42,389	17,519	64,400	59,114
Total assets	10,800,881	9,140,943	10,800,881	9,140,943
Operating Segments | Fintech
Segment Reporting Information [Line Items]
Interest income	(6)	8	14	80
Interest expense	0	0	0	0
Net interest income (loss)	(6)	8	14	80
Provision for loan and lease credit losses	0	0	0	0
Noninterest income	1,652	29,980	5,689	152,878
Noninterest expense	3,069	2,495	8,032	6,809
Income tax expense (benefit)	(5)	416	177	26,138
Net income	(1,418)	27,077	(2,506)	120,011
Total assets	110,914	163,304	110,914	163,304
Other
Segment Reporting Information [Line Items]
Interest income	201	7	454	3
Interest expense	287	367	916	1,303
Net interest income (loss)	(86)	(360)	(462)	(1,300)
Provision for loan and lease credit losses	0	0	0	0
Noninterest income	509	476	1,722	1,672
Noninterest expense	1,713	2,079	5,770	6,180
Income tax expense (benefit)	(112)	(235)	(351)	(1,099)
Net income	(1,178)	(1,728)	(4,159)	(4,709)
Total assets	$ 38,665	$ 10,403	$ 38,665	$ 10,403