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Income Taxes - Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Tax benefit at statutory rate	$ (28,630)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	$ (57,008)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	$ (53,799)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Tax effect of:
Nondeductible compensation	756us-gaap_IncomeTaxReconciliationNondeductibleExpense	1,545us-gaap_IncomeTaxReconciliationNondeductibleExpense	2,545us-gaap_IncomeTaxReconciliationNondeductibleExpense
State taxes, net of federal tax benefit and valuation allowance	2,979us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes	(799)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes	410us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Other	206us-gaap_IncomeTaxReconciliationOtherAdjustments	105us-gaap_IncomeTaxReconciliationOtherAdjustments	210us-gaap_IncomeTaxReconciliationOtherAdjustments
Total	$ (24,689)us-gaap_IncomeTaxExpenseBenefit	$ (56,157)us-gaap_IncomeTaxExpenseBenefit	$ (50,634)us-gaap_IncomeTaxExpenseBenefit

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h))

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-Number 210

-Section 08

-Paragraph h

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Glossary Income Tax Expense (or Benefit)

-URI http://asc.fasb.org/extlink&oid=6515339



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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit).

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