Borrowings - Stated Maturity and Maturity to Call Date (Details) $ in Thousands	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
Stated maturity, 2025	$ 4,086,141
Stated maturity, 2026	3,162,057
Stated maturity, 2027	1,606,381
Stated maturity, 2028	789,080
Stated maturity, 2029	1,252,527
Stated maturity, 2030 and after	1,764,900
Total principal amount, maturity to call date	12,661,086
Hedge accounting adjustments	(241)
Total principal amount, after adjustments	12,660,845
Brokered CDs
Debt Instrument [Line Items]
Stated maturity, 2025	2,763,401
Stated maturity, 2026	1,824,607
Stated maturity, 2027	783,061
Stated maturity, 2028	146,282
Stated maturity, 2029	683,748
Stated maturity, 2030 and after	0
Total principal amount, maturity to call date	6,201,099
Hedge accounting adjustments	(241)
Total principal amount, after adjustments	6,200,858
Unsecured Debt
Debt Instrument [Line Items]
Stated maturity, 2025	498,897
Stated maturity, 2026	496,523
Stated maturity, 2027	0
Stated maturity, 2028	0
Stated maturity, 2029	0
Stated maturity, 2030 and after	0
Total principal amount, maturity to call date	995,420
Hedge accounting adjustments	0
Total principal amount, after adjustments	995,420
Secured Borrowings
Debt Instrument [Line Items]
Stated maturity, 2025	823,843
Stated maturity, 2026	840,927
Stated maturity, 2027	823,320
Stated maturity, 2028	642,798
Stated maturity, 2029	568,779
Stated maturity, 2030 and after	1,764,900
Total principal amount, maturity to call date	5,464,567
Hedge accounting adjustments	0
Total principal amount, after adjustments	$ 5,464,567