Derivatives and Hedging Activities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Derivative Liability [Abstract]
Derivative liability, collateral	$ 124,800	$ 63,800
Fair value of derivative instruments	113,200	46,700
Not Designated as Hedging Instrument
Derivative Asset [Abstract]
Notional Amount	1,167,314	810,458
Fair Value	114,242	47,717
Derivative Liability [Abstract]
Notional Amount	1,145,720	794,441
Fair Value	113,948	47,643
Not Designated as Hedging Instrument \| Customer derivatives – interest rate swaps
Derivative Asset [Abstract]
Notional Amount	1,102,753	790,209
Fair Value	113,848	47,627
Derivative Liability [Abstract]
Notional Amount	1,102,753	790,209
Fair Value	113,848	47,627
Not Designated as Hedging Instrument \| FX Forwards
Derivative Asset [Abstract]
Notional Amount	9,146	0
Fair Value	52	0
Derivative Liability [Abstract]
Notional Amount	9,856	0
Fair Value	70	0
Not Designated as Hedging Instrument \| RPAs sold
Derivative Asset [Abstract]
Notional Amount	0	0
Fair Value	0	0
Derivative Liability [Abstract]
Notional Amount	33,111	4,232
Fair Value	30	16
Not Designated as Hedging Instrument \| RPAs purchased
Derivative Asset [Abstract]
Notional Amount	55,415	20,249
Fair Value	342	90
Derivative Liability [Abstract]
Notional Amount	0	0
Fair Value	$ 0	$ 0

Nominal or face amount used to calculate payments on the derivative asset.

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-Publisher FASB
-Name Accounting Standards Codification
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Fair value, after offset of derivative liability, of 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, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, after offset of derivative asset, of 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, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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Amount of right to receive cash collateral under master netting arrangements offset against derivative liabilities.

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Nominal or face amount used to calculate payments on the derivative liability.

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