Investments (Narrative) (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018 USD ($) security $ / shares	Dec. 31, 2017 USD ($) security
Schedule of Available-for-sale Securities [Line Items]
Restricted stock	$ 452	$ 456
Number of temporarily impaired securities | security	192	127
Unrealized Losses	$ 2,350	$ 1,046
Equity securities held | security	1
Securities pledged as collateral	$ 86,900	84,100
Equity securities	$ 383	$ 365
Federal Home Loan Bank of Pittsburgh [Member]
Schedule of Available-for-sale Securities [Line Items]
Restricted stock per share | $ / shares	$ 100
Non-Federal Home Loan Bank Of Pittsburgh [Member]
Schedule of Available-for-sale Securities [Line Items]
Restricted stock	$ 30