Derivatives - Narrative (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($) derivative_swap	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) derivative_swap	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Derivatives, Fair Value [Line Items]
Collateral requirement threshold			$ 250,000
Collateral posted	$ 9,200,000		9,200,000		$ 4,700,000
Derivative notional amount	$ 92,400,000		$ 92,400,000		94,400,000
Number of derivatives | derivative_swap	8		8
Interest rate swap income	$ 17,000	$ 734,000	$ 17,000	$ 734,000
Residential Mortgage Holding Company
Derivatives, Fair Value [Line Items]
Commitments to originate mortgage loans held for sale	206,300,000		206,300,000		48,800,000
Variable to Fixed
Derivatives, Fair Value [Line Items]
Derivative notional amount	$ 46,200,000		$ 46,200,000
Number of derivatives | derivative_swap	8		8
Fixed to Variable
Derivatives, Fair Value [Line Items]
Derivative notional amount	$ 46,200,000		$ 46,200,000
Number of derivatives | derivative_swap	8		8
Subordinated Debt
Derivatives, Fair Value [Line Items]
Junior subordinated debenture	$ 10,000,000.0		$ 10,000,000.0
Junior subordinated debenture, effective interest rate (percent)	3.72%		3.72%
Debt instrument, interest rate during period (percent)			1.68%
Subordinated Debt | LIBOR
Derivatives, Fair Value [Line Items]
Debt instrument, basis spread on variable rate (percent)			1.37%
Designated as Hedging Instrument | Interest rate swaps
Derivatives, Fair Value [Line Items]
Cash pledged to collateralize fair value exposure on interest rate swap	$ 2,900,000		$ 2,900,000		1,300,000
Unrealized gain (loss) on interest rate swap	$ 2,400,000		$ 2,400,000		$ 534,000