Cash Value of Life Insurance - Additional Information (Detail) |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2015
Policies
Company
|
Dec. 31, 2014
Company
|
|
| Insurance [Abstract] | ||
| Number of life insurance policies owned by the Company | 187 | |
| Insurance companies used | Company | 14 | 14 |
| Policies covering current and former employees and directors | 59 | |