Derivative Financial Instruments - Notional Amounts and Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Asset Derivatives
Notional Amount	$ 114,546	$ 56,256
Fair Value	3,116	910
Derivative Liability [Abstract]
Notional Amount	416,200	840,646
Derivative, fair value	(32,977)	(37,939)
Interest Rate Lock Commitments
Derivative Liability [Abstract]
Derivative, fair value	3,116	910
Derivatives designated as hedging instruments \| Interest rate swaps
Derivative Liability [Abstract]
Notional Amount	88,200	515,646
Derivative, fair value	(6,610)	(24,357)
Derivatives not designated as hedging instruments \| Interest Rate Lock Commitments
Asset Derivatives
Notional Amount	114,546	56,256
Fair Value	3,116	910
Derivatives not designated as hedging instruments \| Forward contracts
Derivative Liability [Abstract]
Notional Amount	118,000	115,000
Fair Value	(485)	(153)
Loans \| Derivatives designated as hedging instruments \| Interest rate swaps
Derivative Liability [Abstract]
Notional Amount		427,446
Derivative, fair value		(21,551)
Loans \| Derivatives designated as hedging instruments \| Forward contracts
Derivative Liability [Abstract]
Notional Amount	0	427,446
Fair Value	0	(21,551)
Securities available-for-sale \| Derivatives designated as hedging instruments \| Interest rate swaps
Derivative Liability [Abstract]
Notional Amount	88,200	88,200
Derivative, fair value	(6,610)	(2,806)
Securities available-for-sale \| Derivatives designated as hedging instruments \| Forward contracts
Derivative Liability [Abstract]
Notional Amount	88,200	88,200
Fair Value	(6,610)	(2,806)
Liability \| Derivatives designated as hedging instruments \| Forward contracts
Derivative Liability [Abstract]
Notional Amount	210,000	210,000
Fair Value	$ (25,882)	$ (13,429)

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

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

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

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Nominal or face amount used to calculate payment on derivative.

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