Derivative Financial Instruments - Interest Rate Swaps Designated as Cash Flow Hedges (Details) - Interest rate swap - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Notional amount	$ 580,800	$ 243,700
Variable rate, commercial loans that are supported by the interest rate swap contracts	290,400	$ 121,800
Cash Flow Hedging
Derivative [Line Items]
Notional amount	$ 70,000
Weighted average fixed pay rates	1.80%
Weighted average variable 3 month LIBOR receive rates	1.90%
Weighted average maturity	3 years 10 months 9 days	0 years
Unrealized gains (losses)	$ (200)
Other liabilities
Derivative [Line Items]
Derivative Liability	12,354	$ 1,438
Other liabilities | Cash Flow Hedging
Derivative [Line Items]
Derivative Liability	$ 300