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Income Taxes (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Income Tax Disclosure [Abstract]        
Provision for federal income taxes $ 1,725,000 $ 1,044,000 $ 3,161,000 $ 1,986,000
Effective income tax rate 30.00% 27.00% 29.00% 27.00%
Statutory tax rate     35.00% 34.00%
Deferred tax asset $ 11,600,000   $ 11,600,000