Share Based Compensation (Additional Information) (Detail) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise period	5 years 5 months 1 day	5 years 0 months 29 days
Options exercised intrinsic value	$ 76,000
Stock Options Granted, Net of Forfeitures	21,245
2005 Omnibus Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares authorizes	1,800,000
Common stock, shares available for issuance	989,123
Term of share based compensation plan	10 years
Minimum grant price percentage	100.00%
2005 Omnibus Stock Plan \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise period	10 years
2005 Omnibus Stock Plan \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise period	7 years
Stock Options and Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Recognized Compensation expense	400,000	400,000
Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized Compensation expense	300,000
Expected cost recognition weighted average period	2 years 4 months 24 days
Options exercised intrinsic value	100,000	100,000
Fair value of shares vested	100,000	100,000
Stock Options Granted	21,245
Vesting period	3 years
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized Compensation expense	$ 5,300,000
Expected cost recognition weighted average period	3 years 8 months 12 days
Stock Options Granted	79,860
Vesting period	5 years

Exercise price of options granted percentage.

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Share Based Compensation Arrangement By Share Based Payment Award Fair Value Of Shares Vested During Year

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- Definition

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

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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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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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Net number of share options (or share units) granted during the period.

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Gross number of share options (or share units) granted during the period.

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