Commitments, Guarantees and Contingent Liabilities - Maximum obligation to extend credit (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Commitments And Contingencies Disclosure [Abstract]
Commitments to make loans	$ 1,154,525	$ 1,175,916
Unused lines of credit	1,007,302	626,348
Standby letters of credit	13,319	10,851
Total	$ 2,175,146	$ 1,813,115