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Retirement Benefits (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
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Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2006
Defined Benefit Plan Disclosure [Line Items]        
Requisite service period for employees to be eligible for 401(k) plan 3 months      
Percent of employer match on employee contributions 25.00%      
Percentage of Contribution from Employees of the First Base Compensation 6.00%      
Percentage of Contribution from Employees of the First Base Compensation Vesting Period 5 years      
Company's Contribution to Its Plan $ 266,000 $ 226,000 $ 218,000  
Estimated net gain that will be amortized from accumulated other comprehensive income (loss) into net periodic cost 11,000      
Transition obligation that will be amortized from accumulated other comprehensive income (loss) into net periodic cost   17,000    
Prior service cost that will be amortized from accumulated other comprehensive income (loss) into net periodic cost     25,000  
Medical cost trend rate 8.75%      
Medical cost trend rate decreasing 0.50%      
Medical cost trend rate ultimate rate 4.75%      
Benefits paid 94,000 107,000 104,000  
Benefits expected to be paid under the postretirement health benefits plan in 2014 98,000      
Benefits expected to be paid under the postretirement health benefits plan in 2015 101,000      
Benefits expected to be paid under the postretirement health benefits plan in 2016 103,000      
Benefits expected to be paid under the postretirement health benefits plan in 2017 105,000      
Benefits expected to be paid under the postretirement health benefits plan in 2018 105,000      
Benefits expected to be paid under the postretirement health benefits plan in 2019 through 2023 505,000      
Benefit plan expenses 963,000 384,000 151,000  
Number of monthly payments 120      
Agreement monthly payment 17,450      
Present value of agreement obligation 536,000 712,000   1,625,000
Supplemental Employee Retirement Plans, Defined Benefit [Member]
        
Defined Benefit Plan Disclosure [Line Items]        
Benefit obligation 6,000,000 4,700,000    
Minimum [Member]
        
Defined Benefit Plan Disclosure [Line Items]        
Percent of compensation employees can invest in 401(k) plan 2.00%      
Company Matching Contributions Percentage 25.00%      
Maximum [Member]
        
Defined Benefit Plan Disclosure [Line Items]        
Percent of compensation employees can invest in 401(k) plan 15.00%      
Company Matching Contributions Percentage 50.00%      
First ESOP [Member]
        
Defined Benefit Plan Disclosure [Line Items]        
Employee stock ownership plan authorized to purchase 2,463,884      
Initial public offering price $ 7.13      
Outstanding loan balance 13,900,000 14,500,000    
Shares released and allcoated to participants 81,631 84,887    
ESOP compensation expense 972,000 856,000 790,000  
Second ESOP [Member]
        
Defined Benefit Plan Disclosure [Line Items]        
Employee stock ownership plan authorized to purchase 1,422,357      
Initial public offering price $ 10.00      
Outstanding loan balance 13,900,000      
Shares released and allcoated to participants 47,412      
ESOP compensation expense 568,000      
Supplemental ESOP [Member]
        
Defined Benefit Plan Disclosure [Line Items]        
Company contribution to SESOP plan $ 38,000 $ 25,000 $ 25,000