Supplemental disclosure on the consolidated statments of cash flows - Cash and due from banks, and restricted cash (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Supplemental Cash Flow Information
Cash and due from banks	$ 411,375	$ 383,385	$ 423,233
Restricted cash and due from banks	8,263	37,077	46,268
Restricted cash in money market investments	9,768	7,113	6,658
Total cash and due from banks, and restricted cash	$ 429,406	$ 427,575	$ 476,159	$ 434,512