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Fair Value Measurements - Recurring and Nonrecurring (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Valuation allowance $ 9,208,000 $ 10,133,000 $ 11,396,000 $ 11,014,000
Provision for credit losses 0 700,000 1,050,000  
Carrying Value
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 443,224,000 393,965,000    
Loans receivable 503,149,000 385,185,000    
Level 1
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 7,514,000 7,948,000    
Loans receivable 0 0    
Level 2
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 435,710,000 386,017,000    
Loans receivable 0 0    
Level 3
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 0 0    
Loans receivable 507,361,000 388,834,000    
Fair Value
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 443,224,000 393,965,000    
Loans receivable 507,361,000 388,834,000    
Nonrecurring | Level 1
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Assets, fair value 0 0    
Nonrecurring | Level 2
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Assets, fair value 0 0    
Nonrecurring | Level 3
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Assets, fair value 133,000 5,290,000    
Nonrecurring | Fair Value
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Assets, fair value 133,000 5,290,000    
Recurring | Level 1
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Assets, fair value 7,514,000 7,948,000    
Recurring | Level 2
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Assets, fair value 435,710,000 386,017,000    
Recurring | Level 3
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Assets, fair value 0 0    
Recurring | Fair Value
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Assets, fair value 443,224,000 393,965,000    
U.S. Government agencies | Recurring | Level 1
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 0 0    
U.S. Government agencies | Recurring | Level 2
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 18,203,000 9,454,000    
U.S. Government agencies | Recurring | Level 3
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 0 0    
U.S. Government agencies | Recurring | Fair Value
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 18,203,000 9,454,000    
Obligations of states and political subdivisions | Recurring | Level 1
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 0 0    
Obligations of states and political subdivisions | Recurring | Level 2
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 158,407,000 161,678,000    
Obligations of states and political subdivisions | Recurring | Level 3
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 0 0    
Obligations of states and political subdivisions | Recurring | Fair Value
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 158,407,000 161,678,000    
U.S. Government agencies collateralized by residential mortgage obligations | Recurring | Level 1
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 0 0    
U.S. Government agencies collateralized by residential mortgage obligations | Recurring | Level 2
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 253,709,000 208,510,000    
U.S. Government agencies collateralized by residential mortgage obligations | Recurring | Level 3
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 0 0    
U.S. Government agencies collateralized by residential mortgage obligations | Recurring | Fair Value
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 253,709,000 208,510,000    
Private label residential mortgage backed securities | Recurring | Level 1
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 0 0    
Private label residential mortgage backed securities | Recurring | Level 2
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 5,391,000 6,375,000    
Private label residential mortgage backed securities | Recurring | Level 3
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 0 0    
Private label residential mortgage backed securities | Recurring | Fair Value
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 5,391,000 6,375,000    
Other equity securities | Recurring | Level 1
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 7,514,000 7,948,000    
Other equity securities | Recurring | Level 2
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 0 0    
Other equity securities | Recurring | Level 3
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 0 0    
Other equity securities | Recurring | Fair Value
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale investment securities 7,514,000 7,948,000    
Impaired loans | Nonrecurring | Carrying Value
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable 194,000 5,386,000    
Valuation allowance 61,000 96,000    
Provision for credit losses 61,000 19,000    
Impaired loans | Nonrecurring | Level 1
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable 0 0    
Impaired loans | Nonrecurring | Level 2
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable 0 0    
Impaired loans | Nonrecurring | Level 3
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable 133,000 5,290,000    
Impaired loans | Nonrecurring | Fair Value
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable 133,000 5,290,000    
Commercial
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Valuation allowance 2,444,000 2,676,000 2,266,000  
Real Estate Portfolio Segment
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Valuation allowance 5,174,000 5,877,000 7,155,000  
Real Estate Portfolio Segment | Impaired loans | Nonrecurring | Level 1
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable   0    
Real Estate Portfolio Segment | Impaired loans | Nonrecurring | Level 2
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable   0    
Real Estate Portfolio Segment | Impaired loans | Nonrecurring | Level 3
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable   5,057,000    
Real Estate Portfolio Segment | Impaired loans | Nonrecurring | Fair Value
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable   5,057,000    
Real Estate Portfolio Segment | Impaired loans | Owner occupied | Nonrecurring | Level 1
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable   0    
Real Estate Portfolio Segment | Impaired loans | Owner occupied | Nonrecurring | Level 2
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable   0    
Real Estate Portfolio Segment | Impaired loans | Owner occupied | Nonrecurring | Level 3
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable   194,000    
Real Estate Portfolio Segment | Impaired loans | Owner occupied | Nonrecurring | Fair Value
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable   194,000    
Real Estate Portfolio Segment | Impaired loans | Real estate construction and other land loans | Nonrecurring | Level 1
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable   0    
Real Estate Portfolio Segment | Impaired loans | Real estate construction and other land loans | Nonrecurring | Level 2
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable   0    
Real Estate Portfolio Segment | Impaired loans | Real estate construction and other land loans | Nonrecurring | Level 3
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable   4,863,000    
Real Estate Portfolio Segment | Impaired loans | Real estate construction and other land loans | Nonrecurring | Fair Value
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable   4,863,000    
Consumer
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Valuation allowance 1,168,000 1,541,000 1,836,000  
Consumer | Impaired loans | Nonrecurring | Level 1
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable 0 0    
Consumer | Impaired loans | Nonrecurring | Level 2
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable 0 0    
Consumer | Impaired loans | Nonrecurring | Level 3
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable 133,000 233,000    
Consumer | Impaired loans | Nonrecurring | Fair Value
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable 133,000 233,000    
Consumer | Impaired loans | Equity loans and lines of credit | Nonrecurring | Level 1
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable 0 0    
Consumer | Impaired loans | Equity loans and lines of credit | Nonrecurring | Level 2
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable 0 0    
Consumer | Impaired loans | Equity loans and lines of credit | Nonrecurring | Level 3
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable 133,000 233,000    
Consumer | Impaired loans | Equity loans and lines of credit | Nonrecurring | Fair Value
        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans receivable $ 133,000 $ 233,000