Supplemental Guarantor Information - Additional Information (Detail) - USD ($) |
Sep. 30, 2015 |
May. 31, 2015 |
---|---|---|
Non-Guarantor Subsidiaries | Maximum [Member] | ||
Condensed Financial Statements Captions [Line Items] | ||
Percentage of Non Guarantor Subsidiaries | 3.00% | |
550 million revolving credit facility [Member] | ||
Condensed Financial Statements Captions [Line Items] | ||
Unsecured revolving credit facility | $ 550,000,000 | $ 550,000,000 |