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Indebtedness - Senior Notes - Additional Information (Detail) - USD ($) $ in Millions | 1 Months Ended |  |  |
--- | --- | --- | --- | ---
May. 31, 2015 | Dec. 31, 2015 | Jul. 31, 2015 | Dec. 31, 2014
4.875% Senior Notes Due 2025 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Aggregate principal amount | $ 750.0 |  |  |
4.875% Senior Notes Due 2025 | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate on notes | 4.875% | 4.875% |  | 4.875%
Net proceeds after underwriting discounts and commissions | $ 737.4 |  |  |
Underwriting discounts and commissions | $ 12.6 |  |  |
Debt instrument redemption, percentage of principal amount | 100.00% |  |  |
6.75% Senior Subordinated Notes Due 2020 | Senior Subordinated Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate on notes | 6.75% | 6.75% | 6.75% | 6.75%

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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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- Definition Gross amount, as of the balance sheet date, of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings in periods after one year or beyond the normal operating cycle, if longer, over the life of the long-term debt instruments to which such costs pertain. + 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 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399 + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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