Derivatives - Schedule of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Jul. 31, 2017
Derivatives, Fair Value [Line Items]
Notional Amount			$ 100,000
Asset	$ 4,328	$ 331
Liability	39,298	14,682
Not designated as hedging:
Derivatives, Fair Value [Line Items]
Notional Amount	3,792,990	1,967,191
Asset	82,587	21,981
Liability	43,892	17,418
Interest rate contracts \| Not designated as hedging:
Derivatives, Fair Value [Line Items]
Notional Amount	590,166	440,556
Asset	39,538	14,929
Liability	39,303	14,929
Forward commitments \| Not designated as hedging:
Derivatives, Fair Value [Line Items]
Notional Amount	1,510,902	684,437
Asset	0	0
Liability	4,523	866
Interest rate-lock commitments \| Not designated as hedging:
Derivatives, Fair Value [Line Items]
Notional Amount	1,364,222	453,198
Asset	43,049	7,052
Liability	0	0
Futures contracts \| Not designated as hedging:
Derivatives, Fair Value [Line Items]
Notional Amount	327,700	389,000
Asset	0	0
Liability	66	1,623
Interest rate swaps \| Designated as hedging:
Derivatives, Fair Value [Line Items]
Notional Amount	30,000	30,000
Asset	0	0
Liability	$ 2,063	$ 515

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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- Definition

Nominal or face amount used to calculate payment on derivative.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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