Derivative Financial Instruments Interest rate swaps designated as cash flow hedges (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021 USD ($) contract	Dec. 31, 2020 USD ($)
Derivative [Line Items]
Weighted average pay rates	2.18%	2.18%
Weighted average receive rates	0.69%	0.38%
Weighted average maturity	3 years 10 months 24 days	4 years 4 months 24 days
Pre-tax unrealized losses included in AOCI	$ (7,937)	$ (11,879)
Maximum Length of Time Hedged in Interest Rate Cash Flow Hedge	10 years
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 160,000	$ 160,000
Derivative, Number of Instruments Held | contract	17