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Stockholders' Equity - Additional Information 1 (Detail) (USD $) | 0 Months Ended | 3 Months Ended
--- | --- | ---
Mar. 20, 2015 | Feb. 17, 2015 | Mar. 31, 2015 | Mar. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Dividends declared date |  |  | Feb. 17, 2015 |
Dividends declared payable date |  |  | Mar. 20, 2015 |
Dividends declared date of record |  |  | Mar. 06, 2015 |
Dividends declared per common share |  | $ 0.13 us-gaap_CommonStockDividendsPerShareDeclared |  |
Dividend paid | $ 28,000,000 us-gaap_DividendsCommonStockCash |  |  |
Stock Appreciation Rights Expense [Member] | General and Administrative Expense [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Compensation expense |  |  | 3,000,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember | 1,000,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember
Payment due to exercise SARs |  |  | 4,000,000 us-gaap_EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember | 14,000,000 us-gaap_EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember
Liability for SARs |  |  | 19,000,000 us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember |
Stock Appreciation Rights Expense [Member] | Restructuring Charges [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Compensation expense |  |  | 0 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember / us-gaap_IncomeStatementLocationAxis = us-gaap_RestructuringChargesMember |
Liability for SARs |  |  | 0 us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember / us-gaap_IncomeStatementLocationAxis = us-gaap_RestructuringChargesMember |
Stock Appreciation Rights Expense [Member] | Restructuring Charges [Member] | Maximum [Member] |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |
Compensation expense |  |  |  | $ 1,000,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember / us-gaap_IncomeStatementLocationAxis = us-gaap_RestructuringChargesMember / us-gaap_RangeAxis = us-gaap_MaximumMember

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for deferred compensation arrangements. Represents currently earned compensation under cash arrangements (such as a profit-sharing plan, rabbi trust, and employee contract--excluding equity-based arrangements) that is not actually paid until a later date. + References No definition available. + Details
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- Definition Date the declared dividend will be paid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Date the dividend to be paid was declared, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition Aggregate cash paid by the entity during the period to settle equity instruments granted under equity-based payment arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (k) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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