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v2.4.1.9

Common Stock (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 0 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 09, 2015 | Mar. 31, 2015 | Mar. 31, 2014 | Mar. 09, 2015 | Dec. 31, 2014
Class of Stock [Line Items] |  |  |  |  |
Common stock, par value (in dollars per share) |  | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare |  |  | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare
Shares issued, price per share | $ 12.80 us-gaap_SharesIssuedPricePerShare |  |  | $ 12.80 us-gaap_SharesIssuedPricePerShare |
Proceeds from sale of common stock | $ 463,100 us-gaap_ProceedsFromIssuanceOfCommonStock | $ 463,218 us-gaap_ProceedsFromIssuanceOfCommonStock | $ 0 us-gaap_ProceedsFromIssuanceOfCommonStock |  |
Common Stock [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Issuance of common stock, shares | 36,800,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember |  |  |  |
Additional Paid-in-Capital [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Proceeds from sale of common stock | 462,700 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  |  |  |
Common Stock [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Issuance of common stock, shares |  | 36,800,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Proceeds from sale of common stock | $ 368 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |  |
Over-Allotment Option [Member] | Common Stock [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Issuance of common stock, shares | 4,800,000 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_OverAllotmentOptionMember |  |  |  |

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- Definition Face amount or stated value per share of common stock. + 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 210.5-02.29) -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 30 -Article 5 + Details
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