Deposits - Maturities of deposits (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Deposits
Due within one year	$ 4,004,937
Due in one year to two years	90,668
Due in two years to three years	39,683
Due in three years to four years	1,114
Due in four years to five years	585
Due in five years to six years	22
Total time deposits	$ 4,137,009	$ 2,989,289