|
Post-Retirement Benefit Plans Other than Pensions - Additional Information (Detail) (USD $)
|
12 Months Ended |
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
| Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |
|
|
|
| Post retirement benefit plans other than pensions, life insurance plan, coverage value maximum |
$ 5,000 |
|
|
| Accrued post-retirement benefit cost |
156,881 |
186,695 |
|
| Deferred compensation plan interest Rate |
3.00% |
3.00% |
6.00% |
| Deferred Compensation |
382,599 |
828,998 |
|
| Deferred compensation earnings allocated to the deferred compensation |
$ 13,859 |
$ 40,575 |
$ 91,552 |
|
Post-Retirement Life Benefit Programs [Member]
|
|
|
|
| Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |
|
|
|
| Post retirement benefit plans other than pensions, supplemental benefits, age |
55 years |
|
|
| Post retirement benefit plans other than pensions, supplemental benefits, years of service |
20 years |
|
|
|
Post-Retirement Supplemental Medicare Benefits Programs [Member]
|
|
|
|
| Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |
|
|
|
| Post retirement benefit plans other than pensions, supplemental benefits, age |
65 years |
|
|
| Post retirement benefit plans other than pensions, supplemental benefits, years of service |
20 years |
|
|