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Stock-Based Compensation - Recognized Financial Statements for Stock Options, Stock Appreciation Rights, and Restricted Stock (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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| Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | |||
| Total Cost of Share-Based Plans Charged Against Income (Added To) Before Tax Effect | $ 901,447 | $ 1,047,335 | $ 253,812 |
| Income Tax Expense (Benefit) Recognized in Income | $ (347,733) | $ (404,010) | $ (97,908) |