Derivative Instruments - Narrative (Details) $ in Thousands	Jun. 01, 2020 warrant_asset	Sep. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)
Derivative [Line Items]
Derivative assets, notional		$ 435,580
Derivative assets		8,642
Designated as Hedging Instrument
Derivative [Line Items]
Derivative assets, notional		300,000
Derivative assets		932
Designated as Hedging Instrument | Interest rate swaps contracts
Derivative [Line Items]
Derivative assets, notional		300,000
Derivative assets		932
Not Designated as Hedging Instruments
Derivative [Line Items]
Derivative assets, notional		135,580	$ 145,181
Derivative assets		7,710	13,967
Not Designated as Hedging Instruments | Interest rate swaps contracts
Derivative [Line Items]
Derivative assets, notional		135,580	145,181
Derivative assets		5,815	12,053
Not Designated as Hedging Instruments | Equity warrants
Derivative [Line Items]
Derivative assets, notional		0	0
Derivative assets		1,895	1,914
Not Designated as Hedging Instruments | Equity warrants | Opus Bank
Derivative [Line Items]
Number of warrant assets acquired | warrant_asset	2
Not Designated as Hedging Instruments | Over the Counter
Derivative [Line Items]
Derivative assets, notional		135,600	145,200
Derivative assets		$ 5,800	$ 12,100