Borrowings - Borrowings by contractual maturities (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Debt Instrument
2024	$ 183,327
2025	144,214
2026	74,500
2028	438,288
Later years	238,003
Total borrowings	1,078,332
Assets sold under agreements to repurchase
Debt Instrument
2024	91,384
2025	0
2026	0
2028	0
Later years	0
Total borrowings	91,384
Notes payable
Debt Instrument
2024	91,943
2025	144,214
2026	74,500
2028	438,288
Later years	238,003
Total borrowings	$ 986,948