Fair Value Measurements Carrying Amounts and Fair Values (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	$ 57,329	$ 27,936
Federal funds sold	15,322	11,845
Investment securities available for sale, at fair value	320,714	272,790
Held-to-maturity securities	51,259	51,343
Federal Home Loan Bank stock	12,447	15,075
Loans, net	1,231,721	1,170,438
Accrued interest receivable	4,688	4,425
Deposits	1,440,729	1,270,462
Short-term borrowings	19,000	66,000
Subordinated notes	20,619	20,619
Federal Home Loan Bank advances, net of discount	98,385	96,888
Long-term debt	8,415	12,676
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities available for sale, at fair value	320,714	272,790
Fair value, inputs, level 1 [Member] | Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	57,329	27,936
Federal funds sold	15,322	11,845
Federal Home Loan Bank stock	12,447	15,075
Accrued interest receivable	4,688	4,425
Federal funds purchased	2,760	2,975
Short-term borrowings	19,000	66,000
Accrued interest payable	343	419
Fair value, inputs, level 1 [Member] | Estimate of fair value, fair value disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and due from banks	57,329	27,936
Federal funds sold	15,322	11,845
Federal Home Loan Bank stock	12,447	15,075
Accrued interest receivable	4,688	4,425
Federal funds purchased	2,760	2,975
Short-term borrowings	19,000	66,000
Accrued interest payable	343	419
Fair value, inputs, level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swaps, derivative liability	774	261
Fair value, inputs, level 2 [Member] | Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity securities	51,259	51,343
Loans, net	1,231,623	1,169,172
Deposits	1,440,729	1,270,462
Subordinated notes	20,619	20,619
Federal Home Loan Bank advances, net of discount	98,385	96,888
Long-term debt	8,415	12,676
Interest rate swaps, derivative liability	774	261
Fair value, inputs, level 2 [Member] | Estimate of fair value, fair value disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Held-to-maturity securities	51,918	51,501
Loans, net	1,235,238	1,198,566
Deposits	1,440,762	1,270,987
Subordinated notes	11,908	13,330
Federal Home Loan Bank advances, net of discount	98,812	96,312
Long-term debt	8,324	12,571
Fair value, inputs, level 3 [Member] | Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net	98	1,266
Fair value, inputs, level 3 [Member] | Estimate of fair value, fair value disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net	98	1,266
Standby letters of credit [Member] | Fair value, inputs, level 3 [Member] | Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Standby letters of credit	0	0
Standby letters of credit [Member] | Fair value, inputs, level 3 [Member] | Estimate of fair value, fair value disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Standby letters of credit	0	0
Commitments to extend credit [Member] | Fair value, inputs, level 3 [Member] | Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Standby letters of credit	0	0
Commitments to extend credit [Member] | Fair value, inputs, level 3 [Member] | Estimate of fair value, fair value disclosure [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Standby letters of credit	$ 0	$ 0