Investments (Narrative) (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) item security	Dec. 31, 2019 USD ($) security $ / shares
Schedule of Available-for-sale Securities [Line Items]
Percent of shareholders equity benchmark for investments in a single issuer	10.00%
Fair Value	$ 396,940	$ 187,433
Number of temporarily impaired securities | security	102	144
Unrealized Losses	$ 701	$ 1,686
Number of investments in a single issuer exceeding benchmark | item	0
Number of investments | item	1
Securities pledged as collateral	$ 137,400	107,100
Restricted stock	468	$ 465
Restricted Stock Cost | $ / shares		$ 100
Equity securities	$ 391	$ 440
Federal Home Loan Bank of Pittsburgh [Member]
Schedule of Available-for-sale Securities [Line Items]
Restricted stock		$ 468