Fair Value of Financial Instruments (Assets Measured at Fair Value on a Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	$ 600,328	$ 639,185
U.S. Treasury and government agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	23	26
U.S. government sponsored agencies
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	400	516
States and political subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	50,579	45,668
Residential mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	503,574	514,096
Commercial mortgage-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	33,606	64,416
Bank-issued trust preferred securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	7,811	10,357
Equity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	4,335	4,106
Fair Value of Securities Disclosed on Balance Sheet [Member] | Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Held-to-Maturity Securities, Fair Value Disclosure	46,610	47,124
Fair Value of Securities Disclosed on Balance Sheet [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Held-to-Maturity Securities, Fair Value Disclosure	0	0
Fair Value of Securities Disclosed on Balance Sheet [Member] | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Held-to-Maturity Securities, Fair Value Disclosure	46,610	47,124
Fair Value of Securities Disclosed on Balance Sheet [Member] | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Held-to-Maturity Securities, Fair Value Disclosure	0	0
Fair Value of Securities Disclosed on Balance Sheet [Member] | States and political subdivisions | Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Held-to-Maturity Securities, Fair Value Disclosure	4,059	4,250
Fair Value of Securities Disclosed on Balance Sheet [Member] | States and political subdivisions | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Held-to-Maturity Securities, Fair Value Disclosure	0	0
Fair Value of Securities Disclosed on Balance Sheet [Member] | States and political subdivisions | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Held-to-Maturity Securities, Fair Value Disclosure	4,059	4,250
Fair Value of Securities Disclosed on Balance Sheet [Member] | States and political subdivisions | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Held-to-Maturity Securities, Fair Value Disclosure	0	0
Fair Value of Securities Disclosed on Balance Sheet [Member] | Residential mortgage-backed securities | Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Held-to-Maturity Securities, Fair Value Disclosure	34,921	34,560
Fair Value of Securities Disclosed on Balance Sheet [Member] | Residential mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Held-to-Maturity Securities, Fair Value Disclosure	0	0
Fair Value of Securities Disclosed on Balance Sheet [Member] | Residential mortgage-backed securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Held-to-Maturity Securities, Fair Value Disclosure	34,921	34,560
Fair Value of Securities Disclosed on Balance Sheet [Member] | Residential mortgage-backed securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Held-to-Maturity Securities, Fair Value Disclosure	0	0
Fair Value of Securities Disclosed on Balance Sheet [Member] | Commercial mortgage-backed securities | Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Held-to-Maturity Securities, Fair Value Disclosure	7,630	8,314
Fair Value of Securities Disclosed on Balance Sheet [Member] | Commercial mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Held-to-Maturity Securities, Fair Value Disclosure	0	0
Fair Value of Securities Disclosed on Balance Sheet [Member] | Commercial mortgage-backed securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Held-to-Maturity Securities, Fair Value Disclosure	7,630	8,314
Fair Value of Securities Disclosed on Balance Sheet [Member] | Commercial mortgage-backed securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Held-to-Maturity Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	600,328	639,185
Recurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	6,094	4,652
Recurring Basis [Member] | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	594,234	634,533
Recurring Basis [Member] | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | U.S. Treasury and government agencies | Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	23	26
Recurring Basis [Member] | U.S. Treasury and government agencies | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | U.S. Treasury and government agencies | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	23	26
Recurring Basis [Member] | U.S. Treasury and government agencies | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | U.S. government sponsored agencies | Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	400	516
Recurring Basis [Member] | U.S. government sponsored agencies | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | U.S. government sponsored agencies | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	400	516
Recurring Basis [Member] | U.S. government sponsored agencies | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | States and political subdivisions | Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	50,579	45,668
Recurring Basis [Member] | States and political subdivisions | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	1,893	681
Recurring Basis [Member] | States and political subdivisions | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	48,686	44,987
Recurring Basis [Member] | States and political subdivisions | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | Residential mortgage-backed securities | Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	503,574	514,096
Recurring Basis [Member] | Residential mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | Residential mortgage-backed securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	503,574	514,096
Recurring Basis [Member] | Residential mortgage-backed securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | Commercial mortgage-backed securities | Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	33,606	64,416
Recurring Basis [Member] | Commercial mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | Commercial mortgage-backed securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	33,606	64,416
Recurring Basis [Member] | Commercial mortgage-backed securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | Bank-issued trust preferred securities | Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	7,811	10,357
Recurring Basis [Member] | Bank-issued trust preferred securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | Bank-issued trust preferred securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	7,811	10,357
Recurring Basis [Member] | Bank-issued trust preferred securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	0
Recurring Basis [Member] | Equity Securities | Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	4,335	4,106
Recurring Basis [Member] | Equity Securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	4,201	3,971
Recurring Basis [Member] | Equity Securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	134	135
Recurring Basis [Member] | Equity Securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale Securities, Fair Value Disclosure	$ 0	$ 0