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Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Total deferred tax valuation allowance					$ 82,500,000
Effective tax provision	1,854,000	(26,528,000)	2,074,000	(36,356,000)
Effective tax rate	5.50%	(53.80%)	2.80%	(47.70%)
Cumulative effect of federal and state valuation losses			40.10%
Decrease in unrecognized tax positions	1,900,000		1,900,000
Possible interest and accrued penalties	$ 2,700,000		$ 2,700,000

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- Definition

The percent increase (decrease) to the effective tax rate for the reporting period related to valuation allowances.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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

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

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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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