Fair Value (Carrying Amounts and Estimated Fair Values of Company's Financial Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financial Assets:
Loans, Net	$ 2,016,423	$ 1,975,147
FHLB Stock and Other Restricted Stock	13,048	13,048
Financial Liabilities:
Time Deposits	(352,274)	(378,181)
Level 1
Financial Assets:
Cash and Short-term Investments	36,833	48,467
Loans, Net	0	0
Accrued Interest Receivable	0	0
Financial Liabilities:
Demand, Savings, and Money Market Deposits	(2,011,047)	(1,971,370)
Time Deposits	0	0
Short-term Borrowings	0	0
Long-term Debt	0	0
Accrued Interest Payable	0	0
Level 2
Financial Assets:
Cash and Short-term Investments	7,204	16,349
Loans, Net	0	0
Accrued Interest Receivable	3,555	3,289
Financial Liabilities:
Demand, Savings, and Money Market Deposits	0	0
Time Deposits	(351,112)	(378,000)
Short-term Borrowings	(118,703)	(137,554)
Long-term Debt	(133,346)	(109,709)
Accrued Interest Payable	(758)	(775)
Level 3
Financial Assets:
Cash and Short-term Investments	0	0
Loans, Net	2,011,522	1,980,523
Accrued Interest Receivable	7,732	8,124
Financial Liabilities:
Demand, Savings, and Money Market Deposits	0	0
Time Deposits	0	0
Short-term Borrowings	0	0
Long-term Debt	(11,110)	(10,793)
Accrued Interest Payable	(15)	(14)
Carrying Value
Financial Assets:
Cash and Short-term Investments	44,037	64,816
Loans, Net	2,015,818	1,974,074
FHLB Stock and Other Restricted Stock	13,048	13,048
Accrued Interest Receivable	11,287	11,413
Financial Liabilities:
Demand, Savings, and Money Market Deposits	(2,011,047)	(1,971,370)
Time Deposits	(352,274)	(378,181)
Short-term Borrowings	(118,703)	(137,554)
Long-term Debt	(144,766)	(120,560)
Accrued Interest Payable	(773)	(789)
Total
Financial Assets:
Cash and Short-term Investments	44,037	64,816
Loans, Net	2,011,522	1,980,523
Accrued Interest Receivable	11,287	11,413
Financial Liabilities:
Demand, Savings, and Money Market Deposits	(2,011,047)	(1,971,370)
Time Deposits	(351,112)	(378,000)
Short-term Borrowings	(118,703)	(137,554)
Long-term Debt	(144,456)	(120,502)
Accrued Interest Payable	$ (773)	$ (789)