Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax expense (benefit) at statutory rate		$ 32,711	$ (26,458)	$ 50,029
State income tax, net of federal tax benefit		11,781	(19,606)	12,885
Valuation allowance		2,781	0	(700)
Amortization of qualified low-income housing investments		16,452	9,577	7,503
Tax credits		(16,456)	(9,183)	(7,300)
Tax-exempt income		(14,911)	(14,161)	(10,298)
162(m) remuneration of services		2,423	1,684	1,446
Other, net		1,424	(5,162)	(1,846)
Total income tax expense (benefit)		$ 36,205	$ (63,309)	$ 51,719
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Income tax expense (benefit) at statutory rate		21.00%	21.00%	21.00%
State income tax, net of federal tax benefit		7.56%	15.56%	5.41%
Valuation allowance		1.79%	0.00%	(0.29%)
Amortization of qualified low-income housing investments		10.56%	(7.60%)	3.15%
Tax credits		(10.56%)	7.29%	(3.06%)
Tax-exempt income		(9.57%)	11.24%	(4.32%)
162(m) remuneration of services		1.56%	(1.34%)	0.61%
Other, net		0.91%	4.10%	(0.77%)
Actual income tax expense (benefit)		23.24%	50.25%	21.71%
Deferred state and local income tax benefit		$ (16,855)	$ 19,486	$ (6,290)
Market Street Securities Corporation
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Deferred state and local income tax benefit	$ 23,700		$ 23,700