Other Assets - Mortgage Servicing Rights - Quantitative Assumptions Used for MSRs (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Minimum
Quantitative assumptions used in determining lower of cost or fair value of MSRs
Conditional prepayment rate (as a percent)	6.31%	6.99%
Life in years (of the MSR)	4 years 5 months 12 days	4 years 1 month 20 days
Weighted-average coupon rate (as a percent)	3.72%	3.71%
Discount rate (as a percent)	10.36%	10.35%
Maximum
Quantitative assumptions used in determining lower of cost or fair value of MSRs
Conditional prepayment rate (as a percent)	12.16%	11.77%
Life in years (of the MSR)	7 years 3 months	7 years 7 days
Weighted-average coupon rate (as a percent)	5.49%	5.66%
Discount rate (as a percent)	11.15%	10.94%
Weighted Average
Quantitative assumptions used in determining lower of cost or fair value of MSRs
Conditional prepayment rate (as a percent)	6.71%	7.16%
Life in years (of the MSR)	7 years 29 days	6 years 11 months 8 days
Weighted-average coupon rate (as a percent)	3.81%	3.80%
Discount rate (as a percent)	10.40%	10.40%