Employee Benefit Plans - Change in Plan Assets (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets, end of year	$ 2,819,910	$ 2,844,808
Pension Plan, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets, beginning of year	2,844,808	4,385,574
Actual return on plan assets	453,556	477,229
Employer contributions
Benefits payments	(478,454)	(2,017,995)
Fair value of plan assets, end of year	2,819,910	2,844,808
Other Postretirement Benefit Plan, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Fair value of plan assets, beginning of year
Employer contributions	15,061	15,309
Benefits payments	(15,061)	(15,309)
Fair value of plan assets, end of year