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Pension Plan - Schedule of Changes in Projected Benefit Obligations (Detail) (USD $)
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12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Compensation And Retirement Disclosure [Abstract] | |||
| Benefit Obligation at Beginning of Year | $ 9,827,454 | $ 9,309,585 | |
| Service Cost | 87,496 | 94,374 | 298,378 |
| Interest Cost | 385,884 | 406,689 | 455,732 |
| Actuarial Loss (Gain) | (804,080) | 636,013 | |
| Benefits and Plan Expenses Paid | (644,492) | (619,207) | |
| Benefit Obligation at End of Year | $ 8,852,262 | $ 9,827,454 | $ 9,309,585 |