Fair Value (Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	$ 8,103	$ 14,836
Loans Held-for-sale	8,103	14,836
Financial Assets:
AFS securities	789,899	779,867
Obligations of states and political subdivisions [Member]
Financial Assets:
AFS securities	7,335	9,001
Mortgage-backed securities issued or guaranteed by U.S. government sponsored enterprises [Member]
Financial Assets:
AFS securities	503,302	480,622
Collateralized mortgage obligations issued or guaranteed by U.S. government sponsored enterprises [Member]
Financial Assets:
AFS securities	272,799	283,890
Equity Securities [Member]
Financial Assets:
AFS securities	806	741
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale	8,103	14,836
Financial Liabilities:
Junior subordinated debt interest rate swaps	7,571	8,372
Fair Value, Measurements, Recurring [Member] | Obligations of states and political subdivisions [Member]
Financial Assets:
AFS securities	7,335
Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities issued or guaranteed by U.S. government sponsored enterprises [Member]
Financial Assets:
AFS securities	503,302	9,001
Fair Value, Measurements, Recurring [Member] | Collateralized mortgage obligations issued or guaranteed by U.S. government sponsored enterprises [Member]
Financial Assets:
AFS securities	272,799	480,622
Fair Value, Measurements, Recurring [Member] | Corporate Bond Securities [Member]
Financial Assets:
AFS securities	5,657	283,890
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Financial Assets:
AFS securities	806	5,613
Readily Available Market Prices (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	0	0
Financial Assets:
AFS securities	0	0
Readily Available Market Prices (Level 1) [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale	0	0
Readily Available Market Prices (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Bond Securities [Member]
Financial Assets:
AFS securities	0	0
Readily Available Market Prices (Level 1) [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Financial Assets:
AFS securities	0	0
Observable Market Data (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	8,103	14,836
Financial Assets:
AFS securities	789,899	779,867
Observable Market Data (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale	8,103	14,836
Financial Liabilities:
Junior subordinated debt interest rate swaps	7,571	8,372
Observable Market Data (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Obligations of states and political subdivisions [Member]
Financial Assets:
AFS securities	7,335
Observable Market Data (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed securities issued or guaranteed by U.S. government sponsored enterprises [Member]
Financial Assets:
AFS securities	503,302	9,001
Observable Market Data (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Collateralized mortgage obligations issued or guaranteed by U.S. government sponsored enterprises [Member]
Financial Assets:
AFS securities	272,799	480,622
Observable Market Data (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Bond Securities [Member]
Financial Assets:
AFS securities	5,657	283,890
Observable Market Data (Level 2) [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Financial Assets:
AFS securities	806	5,613
Company Determined Fair Value (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale, Fair Value Disclosure	0	0
Financial Assets:
AFS securities	0	0
Company Determined Fair Value (Level 3) [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Held-for-sale	0	0
Company Determined Fair Value (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Bond Securities [Member]
Financial Assets:
AFS securities	0	0
Company Determined Fair Value (Level 3) [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]
Financial Assets:
AFS securities	0	0
Interest Rate Swap [Member]
Financial Assets:
Customer interest rate swaps	5,036	1,945
Financial Liabilities:
Junior subordinated debt interest rate swaps	7,571	8,372
Customer interest rate swaps	5,036	1,945
Interest Rate Swap [Member] | Fair Value, Measurements, Recurring [Member]
Financial Assets:
Customer interest rate swaps	5,036	1,945
Financial Liabilities:
Customer interest rate swaps	5,036	1,945
Interest Rate Swap [Member] | Readily Available Market Prices (Level 1) [Member]
Financial Assets:
Customer interest rate swaps	0	0
Financial Liabilities:
Junior subordinated debt interest rate swaps	0	0
Customer interest rate swaps	0	0
Interest Rate Swap [Member] | Observable Market Data (Level 2) [Member]
Financial Assets:
Customer interest rate swaps	5,036	1,945
Financial Liabilities:
Junior subordinated debt interest rate swaps	7,571	8,372
Customer interest rate swaps	5,036	1,945
Interest Rate Swap [Member] | Observable Market Data (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Financial Assets:
Customer interest rate swaps	5,036	1,945
Financial Liabilities:
Customer interest rate swaps	5,036	1,945
Interest Rate Swap [Member] | Company Determined Fair Value (Level 3) [Member]
Financial Assets:
Customer interest rate swaps	0	0
Financial Liabilities:
Junior subordinated debt interest rate swaps	0	0
Customer interest rate swaps	0	0
Interest Rate Lock Commitments [Member]
Financial Assets:
Customer interest rate swaps	307	202
Financial Liabilities:
Customer interest rate swaps	22	15
Interest Rate Lock Commitments [Member] | Fair Value, Measurements, Recurring [Member]
Financial Assets:
Customer interest rate swaps	307	202
Financial Liabilities:
Customer interest rate swaps	22	15
Interest Rate Lock Commitments [Member] | Readily Available Market Prices (Level 1) [Member]
Financial Assets:
Customer interest rate swaps	0	0
Financial Liabilities:
Customer interest rate swaps	0	0
Interest Rate Lock Commitments [Member] | Observable Market Data (Level 2) [Member]
Financial Assets:
Customer interest rate swaps	307	202
Financial Liabilities:
Customer interest rate swaps	22	15
Interest Rate Lock Commitments [Member] | Observable Market Data (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Financial Assets:
Customer interest rate swaps	307	202
Financial Liabilities:
Customer interest rate swaps	22	15
Interest Rate Lock Commitments [Member] | Company Determined Fair Value (Level 3) [Member]
Financial Assets:
Customer interest rate swaps	0	0
Financial Liabilities:
Customer interest rate swaps	0	0
Interest Rate Lock Commitments [Member] | Company Determined Fair Value (Level 3) [Member] | Fair Value, Measurements, Recurring [Member]
Financial Liabilities:
Customer interest rate swaps	0	0
Forward Contracts [Member]
Financial Assets:
Customer interest rate swaps	158	587
Financial Liabilities:
Junior subordinated debt interest rate swaps	21
Customer interest rate swaps	16	309
Forward Contracts [Member] | Fair Value, Measurements, Recurring [Member]
Financial Assets:
Customer interest rate swaps	158	587
Financial Liabilities:
Customer interest rate swaps	16	309
Forward Contracts [Member] | Readily Available Market Prices (Level 1) [Member]
Financial Assets:
Customer interest rate swaps	0	0
Financial Liabilities:
Junior subordinated debt interest rate swaps	0
Customer interest rate swaps	0	0
Forward Contracts [Member] | Observable Market Data (Level 2) [Member]
Financial Assets:
Customer interest rate swaps	158	587
Financial Liabilities:
Junior subordinated debt interest rate swaps	21
Customer interest rate swaps	16	309
Forward Contracts [Member] | Observable Market Data (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Financial Assets:
Customer interest rate swaps	158	587
Financial Liabilities:
Customer interest rate swaps	16	309
Forward Contracts [Member] | Company Determined Fair Value (Level 3) [Member]
Financial Assets:
Customer interest rate swaps	0	0
Financial Liabilities:
Junior subordinated debt interest rate swaps	0
Customer interest rate swaps	0	0
Forward-Starting Interest Rate Swap [Member]
Financial Liabilities:
Junior subordinated debt interest rate swaps		389
Forward-Starting Interest Rate Swap [Member] | Fair Value, Measurements, Recurring [Member]
Financial Liabilities:
Junior subordinated debt interest rate swaps	21	389
Forward-Starting Interest Rate Swap [Member] | Readily Available Market Prices (Level 1) [Member]
Financial Liabilities:
Junior subordinated debt interest rate swaps		0
Forward-Starting Interest Rate Swap [Member] | Observable Market Data (Level 2) [Member]
Financial Liabilities:
Junior subordinated debt interest rate swaps		389
Forward-Starting Interest Rate Swap [Member] | Observable Market Data (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Financial Liabilities:
Junior subordinated debt interest rate swaps	$ 21	389
Forward-Starting Interest Rate Swap [Member] | Company Determined Fair Value (Level 3) [Member]
Financial Liabilities:
Junior subordinated debt interest rate swaps		0
Other Assets [Member] | Fair Value, Measurements, Recurring [Member]
Financial Assets:
Customer interest rate swaps		741
Other Assets [Member] | Observable Market Data (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Financial Assets:
Customer interest rate swaps		$ 741