Borrowings and Subordinated Debentures (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Advances from the Federal Home Loan Bank [Abstract]
Line of credit with federal home loan bank, amount	$ 300,800
Federal Home Loan Bank, advances, weighted average rate	1.36%	1.35%
Federal Home Loan Bank, advances, activity for year, average balance of agreements outstanding	$ 59,300	$ 53,600
Federal Home Loan Bank, advances, general debt obligations, disclosures, collateral pledged	20,100
Amount [Abstract]
2016		19,000
2017	44,000	25,000
2018	10,000	10,000
2021	15,000
Total FHLB borrowings	$ 69,000	$ 54,000
Rate [Abstract]
2016		0.85%
2017	1.19%	1.46%
2018	2.01%	2.01%
2021	1.40
Repayments of Long-term Debt	$ 11,970	$ 10,456
Market value of investment securities pledged as collateral	74,800
Line of credit maximum borrowing capacity	20,000
Outstanding line of credit	0
Notes PayableTo PNCBank Due January2018 Member
Rate [Abstract]
Market value of investment securities pledged as collateral	$ 39,500
Notes payable [Member] | Notes Payable To PNCBank Due August2016 Member
Rate [Abstract]
Notes payable with PNC Bank		2,000
Description of variable rate basis on notes payable	one month LIBOR
Notes payable [Member] | Notes PayableTo PNCBank Due January2018 Member
Rate [Abstract]
Notes payable with PNC Bank	$ 35,000	$ 35,000
Weighted average interest rate on other borrowings from PNC Bank (as a percent)	3.65%
Notes payable [Member] | London Interbank Offered Rate (LIBOR) [Member] | Notes Payable To PNCBank Due August2016 Member
Rate [Abstract]
Trust preferred securities basis spread on variable rate (as a percent)	0.15%