Derivatives - Narrative (Details)	3 Months Ended
	Mar. 31, 2021 USD ($) swap	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Derivatives, Fair Value [Line Items]
Collateral requirement threshold	$ 250,000
Collateral posted	7,100,000		$ 10,700,000
Derivative notional amount	$ 201,400,000		196,000,000.0
Number of derivatives | swap	17
Interest rate swap income	$ 92,000	$ 0
Residential Mortgage Holding Company
Derivatives, Fair Value [Line Items]
Commitments to originate mortgage loans held for sale	181,400,000		150,300,000
LIBOR
Derivatives, Fair Value [Line Items]
Derivative notional amount	158,300,000
Subordinated debt
Derivatives, Fair Value [Line Items]
Junior subordinated debenture	$ 10,000,000.0
Junior subordinated debenture, effective interest rate (percent)	3.72%
Debt instrument, interest rate during period (percent)	1.55%
Subordinated debt | LIBOR
Derivatives, Fair Value [Line Items]
Debt instrument, basis spread on variable rate (percent)	1.37%
Variable to Fixed
Derivatives, Fair Value [Line Items]
Derivative notional amount	$ 100,700,000
Number of derivatives | swap	17
Fixed to Variable
Derivatives, Fair Value [Line Items]
Derivative notional amount	$ 100,700,000
Number of derivatives | swap	17
Interest rate swaps | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Cash pledged to collateralize fair value exposure on interest rate swap	$ 2,900,000		2,900,000
Unrealized loss on interest rate swap	475,000		$ 1,700,000
Interest rate swaps | Subordinated debt | LIBOR
Derivatives, Fair Value [Line Items]
Derivative notional amount	$ 10,300,000