Borrowings - Borrowings by contractual maturities (Details) $ in Thousands	Dec. 31, 2024 USD ($)
Debt Instrument [Line Items]
2025	$ 424,048
2026	74,500
2027	0
2028	439,548
2029	39,657
Later years	198,373
Total borrowings	1,176,126
Assets sold under agreements to repurchase
Debt Instrument [Line Items]
2025	54,833
2026	0
2027	0
2028	0
2029	0
Later years	0
Total borrowings	54,833
Short term borrowings
Debt Instrument [Line Items]
2025	225,000
2026	0
2027	0
2028	0
2029	0
Later years	0
Total borrowings	225,000
Notes payable
Debt Instrument [Line Items]
2025	144,215
2026	74,500
2027	0
2028	439,548
2029	39,657
Later years	198,373
Total borrowings	$ 896,293