Other Derivatives - Balance Sheet Category and Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair value	$ 4,306	$ 311
Other Liabilities
Notional amount	203,882	134,059
Fair value	4,697	471
Other Liabilities | Interest Rate Product
Notional amount	176,851	56,806
Fair value	4,561	319
Other Liabilities | Mortgage Banking
Notional amount	0	49,869
Fair value	0	66
Other Liabilities | Other Contracts
Notional amount	27,031	27,384
Fair value	136	86
Designated Cash Flow Hedge | Other Liabilities | Interest Rate Product
Notional amount	100,000	100,000
Fair value	910	206
Not Designated as Hedging Instrument
Notional amount	586,839	106,675
Fair value	10,321	591
Not Designated as Hedging Instrument | Other Assets | Interest Rate Product
Notional amount	176,851	56,806
Fair value	4,306	311
Not Designated as Hedging Instrument | Other Assets | Mortgage Banking
Notional amount	409,988	49,869
Fair value	$ 6,015	$ 280