Pension Plan - Schedule of Fair Values of Plan Assets and Fair Value Measurements (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Alternative Investments	$ 9,259,932	$ 8,509,771	$ 7,723,072
Quoted Prices in Active Markets (Level 1 Inputs) [Member]
Defined Benefit Plan Disclosure [Line Items]
Alternative Investments	9,259,932	8,509,771
Cash and Cash Equivalents [Member] | Quoted Prices in Active Markets (Level 1 Inputs) [Member]
Defined Benefit Plan Disclosure [Line Items]
Alternative Investments	263,452	369,174
Equity Securities [Member] | Quoted Prices in Active Markets (Level 1 Inputs) [Member]
Defined Benefit Plan Disclosure [Line Items]
Alternative Investments	6,134,969	5,305,492
Fixed Income Securities [Member] | Quoted Prices in Active Markets (Level 1 Inputs) [Member]
Defined Benefit Plan Disclosure [Line Items]
Alternative Investments	2,730,912	2,835,105
Alternative Investments [Member] | Quoted Prices in Active Markets (Level 1 Inputs) [Member]
Defined Benefit Plan Disclosure [Line Items]
Alternative Investments	$ 130,599