Comprehensive Income/(Loss) - Components of Accumulated Other Comprehensive Income/(Loss) (Parenthetical) (Detail) |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
Statement of Comprehensive Income [Abstract] | |||
Percentage of Federal and State income tax rate | 37.00% | 37.00% | 37.00% |