New accounting standards (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Jan. 01, 2024	Dec. 31, 2023
New accounting standards
Other assets	$ 99,921		$ 72,587
Other liabilities	79,297		57,304
Retained earnings	$ 667,675		$ 663,726
Accounting Standards (ASU) No. 2023-02 | Adjustment
New accounting standards
Other assets		$ 19,000
Other liabilities		21,000
Retained earnings		$ (1,700)