Derivatives - Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Asset	$ 27,384	$ 68,938
Liability	21,000	48,242
Not designated as hedging
Derivatives, Fair Value [Line Items]
Notional Amount	2,696,444	3,532,227
Asset	27,384	68,938
Liability	20,215	46,333
Not designated as hedging | Interest rate contracts
Derivatives, Fair Value [Line Items]
Notional Amount	600,048	606,878
Asset	19,265	34,547
Liability	19,138	34,317
Not designated as hedging | Forward commitments
Derivatives, Fair Value [Line Items]
Notional Amount	1,180,000	1,358,328
Asset	0	0
Liability	1,077	11,633
Not designated as hedging | Interest rate-lock commitments
Derivatives, Fair Value [Line Items]
Notional Amount	487,396	1,191,621
Asset	7,197	34,391
Liability	0	0
Not designated as hedging | Futures contracts
Derivatives, Fair Value [Line Items]
Notional Amount	429,000	375,400
Asset	922	0
Liability	0	383
Designated as hedging | Interest rate swaps
Derivatives, Fair Value [Line Items]
Notional Amount	30,000	30,000
Asset	0	0
Liability	$ 785	$ 1,909