Deposits - Interest-bearing or Noninterest-bearing (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
U.S.:
Interest-bearing	$ 11,553,298	$ 10,928,712
Noninterest-bearing	8,498,187	6,674,352
Foreign:
Interest-bearing	868,985	776,897
Noninterest-bearing	895,676	847,762
Total deposits	$ 21,816,146	$ 19,227,723