Derivatives (Notional Amount and Fair Value of Derivative Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Other Assets
Notional Amount
Derivative asset	$ 284,481	$ 135,478
Fair Value
Derivative asset	16,607	4,974
Other Liabilities
Notional Amount
Derivative liability	239,212	125,502
Fair Value
Derivative liability	14,867	4,717
Customer-initiated derivatives
Fair Value
Derivative asset	14,422	4,684
Derivative liability	14,422	4,684
Customer-initiated derivatives | Designated as Hedging Instrument | Other Assets
Notional Amount
Derivative asset	135,462	103,941
Fair Value
Derivative asset	14,422	4,684
Customer-initiated derivatives | Designated as Hedging Instrument | Other Liabilities
Notional Amount
Derivative liability	135,462	103,941
Fair Value
Derivative liability	14,422	4,684
Forward contracts related to mortgage loans to be delivered for sale | Not Designated as Hedging Instrument | Other Assets
Notional Amount
Derivative asset	38,840	6,018
Fair Value
Derivative asset	117	34
Forward contracts related to mortgage loans to be delivered for sale | Not Designated as Hedging Instrument | Other Liabilities
Notional Amount
Derivative liability	99,697	20,633
Fair Value
Derivative liability	441	33
Interest rate lock commitments | Not Designated as Hedging Instrument | Other Assets
Notional Amount
Derivative asset	110,179	25,519
Fair Value
Derivative asset	2,068	256
Interest rate lock commitments | Not Designated as Hedging Instrument | Other Liabilities
Notional Amount
Derivative liability	4,053	928
Fair Value
Derivative liability	$ 4	$ 0