Stock-Based Awards and Per Share Information - Additional Information (Detail) (USD $)	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation cost related to stock options	$ 310,000	$ 368,000
Net impact of share based compensation expense to earnings per basic share	$ (0.01)	$ (0.01)
Net impact of share based compensation expense to earnings per diluted share	$ (0.01)	$ (0.01)
Total unrecognized compensation cost	$ 2,200,000
Unrecognized share based compensation cost to be recognized over weighted-average period	1 year 6 months
Outstanding stock options and warrants excluded from diluted loss per share	5,998,000	5,060,000
Annual stock dividend policy for 2014	2.00%
Dividends declared, date of record	Mar. 14, 2014
Two Thousand Two Stock Incentive Plan.
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Plan expiration date	May 05, 2019
Common stock authorized for issuance under the 2002 Plan	7,750,000
Common stock issued pursuant to options exercised	2,957,000
Common stock shares reserved for future issuance	4,400,000
Options available for future grant	393,000

Number of shares of stock issued as of the balance sheet date as a result of stock options exercised.

No definition available.

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Share-based compensation net impact on earning per share basic.

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Share-based compensation net impact on earning per share diluted.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Aggregate number of common shares reserved for future issuance.

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Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The percentage of earnings allocable to participating policyholders based on earnings of such policies for payment of dividends.

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Date the equity-based award expires, in CCYY-MM-DD format.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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