Acquisitions and Dispositions (Surrender of Certain Corporate-Owned Life Insurance Policies) - Additional Information (Detail) - USD ($) $ in Thousands |
1 Months Ended | 3 Months Ended |
|---|---|---|
Mar. 31, 2015 |
May 29, 2015 |
|
| Investments, All Other Investments [Abstract] | ||
| Proceeds from surrender of corporate-owned life insurance policies | $ 24,100 | $ 24,068 |