Deposits - Schedule of Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Deposits [Abstract]
Demand checking accounts	$ 4,032,529	$ 1,692,394
NOW accounts	1,445,894	617,246
Savings accounts	2,954,029	1,721,247
Money market accounts (Non-payroll)	4,636,548	2,116,360
Total core deposit accounts	13,069,000	6,147,247
Certificate of deposit accounts maturing:
Within six months	2,983,888	1,287,280
After six months but within 1 year	872,307	492,098
After 1 year but within 2 years	266,649	78,153
After 2 years but within 3 years	21,781	13,188
After 3 years but within 4 years	5,512	12,028
After 4 years but within 5 years	6,137	2,498
5+ Years	266	199
Total certificate of deposit accounts	4,156,540	1,885,444
Payroll deposits	1,878,758	0
Brokered deposit accounts	410,359	868,953
Total deposits	$ 19,514,657	$ 8,901,644
Weighted Average Rate of Demand checking accounts
Demand checking accounts	0.00%	0.00%
NOW accounts	0.88%	0.57%
Savings accounts	1.82%	4.40%
Money market accounts (Non-payroll)	2.62%	2.58%
Total core deposit accounts	2.06%	2.18%
Weighted Average Rate of Certificate of deposit accounts maturing:
Within six months	3.64%	4.48%
After six months but within 1 year	3.48%	4.06%
After 1 year but within 2 years	3.27%	3.34%
After 2 years but within 3 years	2.06%	2.13%
After 3 years but within 4 years	0.79%	3.27%
After 4 years but within 5 years	0.47%	1.16%
5+ Years	0.49%	0.50%
Total certificate of deposit accounts	3.56%	4.30%
Payroll deposits	3.42%	0.00%
Brokered deposit accounts	4.13%	4.42%
Total deposits	2.06%	2.85%