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Debt - Senior Notes (Detail) (USD $)
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1 Months Ended |
12 Months Ended |
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Jul. 31, 2014
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Jan. 31, 2013
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Dec. 31, 2014
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Dec. 31, 2013
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Jun. 17, 2014
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| Debt Instrument [Line Items] |
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| Debt, face amount |
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$ 1,325,000,000 |
$ 1,192,500,000 |
$ 1,325,000,000 |
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| Redemption of Senior Notes |
|
|
132,500,000 |
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| Loss on extinguishment of debt |
7,400,000 |
20,700,000 |
7,390,000 |
20,744,000 |
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| Senior Notes [Member] |
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| Debt Instrument [Line Items] |
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| Debt instrument, stated interest rate |
|
8.75% |
8.75% |
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8.75% |
| Debt instrument, Interest payment frequency |
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Semi-annually on February 1st and August 1st of each year |
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| Debt instrument, maturity date |
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Feb. 01, 2019 |
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| Redemption of Senior Notes |
132,500,000 |
|
132,500,000 |
|
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| Call premium |
4,000,000 |
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|
|
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| Accrued and unpaid interest |
5,200,000 |
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|
|
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| Loss on extinguishment of debt |
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|
7,400,000 |
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| Write-off related unamortized debt issuance costs |
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|
3,400,000 |
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| Deferred financing fees |
|
42,000,000 |
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| Amortization of deferred financing fees |
|
|
5,700,000 |
4,900,000 |
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| Unamortized deferred financing fees |
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|
28,000,000 |
37,100,000 |
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| Interest expense |
|
|
110,600,000 |
106,900,000 |
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| Interest paid |
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|
$ 115,400,000 |
$ 58,600,000 |
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| Senior Notes [Member] | Any Time Prior to August 1, 2015 [Member] |
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| Debt Instrument [Line Items] |
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| Debt instrument, percentage of aggregate principal amount that may be redeemed |
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35.00% |
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| Debt instrument, redemption price percentage |
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|
108.75% |
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| Senior Notes [Member] | During Any 12-Month Period Commencing from the Issue Date Until August 1, 2015 [Member] |
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| Debt Instrument [Line Items] |
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| Debt instrument, percentage of aggregate principal amount that may be redeemed |
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10.00% |
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| Debt instrument, redemption price percentage |
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103.00% |
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