Derivative Instruments and Hedging Activities - Amount of Gain or Loss Recognized in Income on Derivatives (Details) - Not Designated as Hedging Instruments - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Total Derivatives Gain/(Loss)	$ 822	$ 143	$ 2,249	$ 142
Interest rate swap contracts—commercial loans
Derivative Instruments, Gain (Loss) [Line Items]
Total Derivatives Gain/(Loss)	(62)	26	52	(96)
Interest rate lock commitments—mortgage loans
Derivative Instruments, Gain (Loss) [Line Items]
Total Derivatives Gain/(Loss)	186	310	2,792	398
Forward sale contracts—mortgage loans
Derivative Instruments, Gain (Loss) [Line Items]
Total Derivatives Gain/(Loss)	$ 698	$ (193)	$ (595)	$ (160)