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Income Taxes (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Income Tax Disclosure [Abstract]        
Provision for federal income taxes $ 2,288,000 $ 1,725,000 $ 4,075,000 $ 3,161,000
Effective income tax rate 31.00% 30.00% 29.00% 29.00%
Deferred tax asset $ 11,600,000   $ 11,600,000