Derivative Financial Instruments - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) interest_rate_swap instrument	Dec. 31, 2019 USD ($) interest_rate_swap
Derivative [Line Items]
Estimated amount to be transferred from accumulated other comprehensive income to earnings	$ 975
Termination value of derivatives in a net liability position	81,962
Derivative collateral posted	79,575
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional amount of interest rate derivatives	$ 766,919	$ 692,287
Federal Home Loan Bank Advances
Derivative [Line Items]
Number of debt instruments held | instrument	2
Interest rate contracts | Not Designated as Hedging Instrument
Derivative [Line Items]
Increase in derivative assets	$ 50,900
Increase in derivative liabilities	52,100
Increase in outstanding notional balance	$ 74,600
Cash Flow Hedging | Interest Rate Swap
Derivative [Line Items]
Number of interest rate derivatives held | interest_rate_swap	4	4
Notional amount of interest rate derivatives	$ 46,000	$ 46,000
Cash Flow Hedging | Interest Rate Swap | Trust Preferred Debt
Derivative [Line Items]
Notional amount of interest rate derivatives	26,000
Cash Flow Hedging | Interest Rate Swap | Federal Home Loan Bank Advances
Derivative [Line Items]
Notional amount of interest rate derivatives	$ 20,000