Off-Balance Sheet Arrangements, Commitments, and Contingencies - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Commitments [Line Items]
Commitments	$ 2,507,911	$ 1,947,250
Off-balance sheet, credit loss, liability	27,300	31,100
Commitments to invest in qualified affordable housing partnerships	17,229	18,100
Trust custodial assets under custody	18,110,000	15,890,000
Commitments to extend credit
Commitments [Line Items]
Commitments	2,464,656	$ 1,908,479
Commitments to extend credit | Commercial and industrial
Commitments [Line Items]
Commitments	$ 1,940,000