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Related-Party Arrangements - Additional Information (Detail) - USD ($) | 1 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 31, 2013 | Oct. 31, 2007 | Jun. 30, 2015
Related Party Transaction [Line Items] |  |  |
Amount available for future borrowings |  |  | $ 30,100,000
Additional borrowings |  |  | 0
Principal stockholder |  |  |
Related Party Transaction [Line Items] |  |  |
Loan agreement with related party | $ 370,000,000 | $ 350,000,000 |
Principal stockholder | Amended Agreement |  |  |
Related Party Transaction [Line Items] |  |  |
Maturity date | Jan. 05, 2020 |  |
Principal stockholder | Loan Arrangement |  |  |
Related Party Transaction [Line Items] |  |  |
Principal amount outstanding under credit facility |  |  | 49,500,000
Amount available for future borrowings |  |  | $ 30,100,000
Fixed borrowing rate |  |  | 5.84%
Interest payable |  |  | $ 4,900,000
Related party transaction prepayment period |  |  | 90 days
Aggregate principal amount cancelled |  |  | $ 105,000,000
Principal stockholder | Loan Arrangement | Maximum |  |  |
Related Party Transaction [Line Items] |  |  |
Amount prepaid for cancellation of indebtedness |  |  | $ 200,000,000
Principal stockholder | Loan Arrangement | Minimum |  |  |
Related Party Transaction [Line Items] |  |  |
Number of months advances outstanding |  |  | 12 months
Related Party Debt | Letter Agreement |  |  |
Related Party Transaction [Line Items] |  |  |
Description of variable rate interest |  |  | The interest rate will increase to the one-year LIBOR calculated on the date of the initial advance or in effect on the date of default, whichever is greater, plus 5% per annum.
Related Party Debt | Letter Agreement | LIBOR |  |  |
Related Party Transaction [Line Items] |  |  |
Interest rate (LIBOR) |  |  | 5.00%

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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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- Definition Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format. + 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)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: 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 Reference 2: 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) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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