Reconciliation of Weighted Average Shares Used in Computation of Loss Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Earnings Per Share Disclosure [Line Items]
Income (loss) available to common stockholders	$ 214	$ 4,240
Income (loss) available to common stockholders plus assumed exercises and conversion	$ 214	$ 4,240	$ (15,786)	$ (6,335)
Earnings per share - basic
Weighted Average Shares, available to common stockholders	25,765	26,947	25,766	27,095
Effect of dilutive securities:
Options and warrants	10	20
Unvested restricted stock grants	95	129
Earnings per share - diluted
Weighted Average Shares, available to common stockholders plus assumed exercises and conversion	25,870	27,096
Earnings per share - basic
Income available to common stockholders, Per Share	$ 0.01	$ 0.16
Earnings per share - diluted
Income available to common stockholders plus assumed exercises and conversion, Per Share	$ 0.01	$ 0.16
Net loss available to common stockholders, Per share	$ 0.01	$ 0.16	$ (0.61)	$ (0.23)

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Incremental Common Shares Attributable to Restricted Stock Units

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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