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Long-Term Debt and Short-Term Debt - Schedule of Debt Restated for Adoption of New Accounting Standard (Parenthetical) (Detail) - USD ($) | Jun. 30, 2016 | Dec. 31, 2015
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Senior Notes Due 2020 [Member] |  |
Debt Instrument [Line Items] |  |
Borrowings | $ 250,000,000 |
Senior Notes Due 2020 [Member] | Audited [Member] |  |
Debt Instrument [Line Items] |  |
Borrowings |  | $ 250,000,000
Senior Notes Due 2020 [Member] | Restated [Member] |  |
Debt Instrument [Line Items] |  |
Borrowings |  | 250,000,000
Senior Secured Term Loan B [Member] |  |
Debt Instrument [Line Items] |  |
Borrowings | 575,000,000 |
Senior Secured Term Loan B [Member] | Audited [Member] |  |
Debt Instrument [Line Items] |  |
Borrowings |  | 575,000,000
Senior Secured Term Loan B [Member] | Restated [Member] |  |
Debt Instrument [Line Items] |  |
Borrowings |  | 575,000,000
Senior Secured Revolving Facility [Member] |  |
Debt Instrument [Line Items] |  |
Borrowings | $ 100,000,000 |
Senior Secured Revolving Facility [Member] | Audited [Member] |  |
Debt Instrument [Line Items] |  |
Borrowings |  | 100,000,000
Senior Secured Revolving Facility [Member] | Restated [Member] |  |
Debt Instrument [Line Items] |  |
Borrowings |  | 100,000,000
ASU 2015-13 Reclass [Member] | Senior Notes Due 2020 [Member] |  |
Debt Instrument [Line Items] |  |
Borrowings |  | 250,000,000
ASU 2015-13 Reclass [Member] | Senior Secured Term Loan B [Member] |  |
Debt Instrument [Line Items] |  |
Borrowings |  | 575,000,000
ASU 2015-13 Reclass [Member] | Senior Secured Revolving Facility [Member] |  |
Debt Instrument [Line Items] |  |
Borrowings |  | $ 100,000,000

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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