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Components of Debt Obligations (Parenthetical) (Detail) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 | Dec. 31, 2014
6 3/4 % Senior Notes Due 2020 |  |
Debt Instrument [Line Items] |  |
Interest percentage | 6.75% | 6.75%
Debt maturity period | 2020 | 2020
6.0% Senior Notes Due 2022 |  |
Debt Instrument [Line Items] |  |
Interest percentage | 6.00% | 6.00%
Debt maturity period | 2022 | 2022

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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