|
Income Taxes - Summary of Significant Components of Deferred Tax Position (Detail) (USD $)
In Thousands, unless otherwise specified
|
Dec. 31, 2014
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Dec. 31, 2013
|
Dec. 31, 2012
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| Deferred tax assets: |
|
|
|
| Net operating loss and credit carryforwards |
$ 479,569 |
$ 417,536 |
|
| Pension |
14,547 |
9,606 |
|
| Payment-in-kind interest |
10,142 |
10,211 |
|
| Compensation reserves |
10,025 |
8,348 |
|
| Inventory reserves |
9,875 |
7,546 |
|
| Inventory capitalization |
3,343 |
2,885 |
|
| Capitalized expenses |
5,143 |
0 |
|
| Bad debt reserves |
761 |
841 |
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| Other |
2,230 |
2,046 |
|
| Gross deferred tax assets |
535,635 |
459,019 |
|
| Less: valuation allowance |
(453,729) |
(323,335) |
(195,700) |
| Deferred tax assets, net of allowance |
81,906 |
135,684 |
|
| Deferred tax liabilities: |
|
|
|
| Property, plant, and equipment |
(52,183) |
(100,507) |
|
| Cancellation of debt income deferral |
(17,335) |
(21,878) |
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| Deferred repair charges |
(7,631) |
(6,188) |
|
| Intangible assets |
(5,578) |
(8,241) |
|
| Unrealized hedge income |
(345) |
(4,046) |
|
| Prepaid expenses |
(2,613) |
(998) |
|
| Total deferred tax liabilities |
(85,685) |
(141,858) |
|
| Net deferred tax liabilities |
$ (3,779) |
$ (6,174) |
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