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Schedule of Debt Outstanding (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Debt Instrument [Line Items] |  |
Long-term debt | $ 1,195,000 | $ 1,205,000
Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Long-term debt | 520,000 | 530,000
Senior Notes 4.625% Due 2023 |  |
Debt Instrument [Line Items] |  |
Long-term debt | 350,000 | 350,000
Senior Notes 4.125% Due 2020 |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 325,000 | $ 325,000

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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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