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Pension and Profit Sharing - Amounts Recognized in Other Comprehensive Income (Details) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Compensation and Retirement Disclosure [Abstract] |  |
Balance at beginning of the year | $ 1,762,345 | $ 1,830,465
Change in net loss | 82,657 | 65,570
Amortization of actuarial loss | (135,759) | (124,536)
Amortization of prior service cost | (9,154) | (9,154)
Change recognized in other comprehensive income | (62,256) | (68,120)
Total recognized in other comprehensive income | 1,700,089 | 1,762,345
Net actuarial loss | 1,669,914 | 1,723,016
Prior service cost | 30,175 | 39,329
Total | $ 1,700,089 | $ 1,762,345

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