Employee Service Share Based Compensation Shares Received From Exercise Of Stock Options

No definition available.

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- Definition

Employee Service Share Based Compensation Value Of Shares Received From Exercise Of Stock Options

+ References

No definition available.

+ Details

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Description

+ References

No definition available.

+ Details

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- Definition

Share Based Compensation Arrangement By Share Payment Option Exercisable Maximum Period

+ References

No definition available.

+ Details

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- Definition

Stock Option Exercise Price Minimum Percentage On Grant Date Fair Value Of Underlying Shares

+ References

No definition available.

+ Details

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- Definition

Stock Option Ownership Percentage Required For Exercise Price Of Fair Market Value

+ References

No definition available.

+ Details

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- Definition

This element represents the amount of recognized equity-based compensation related to stock options during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized).

+ References

No definition available.

+ Details

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- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph i

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

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.

+ References

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

+ Details

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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- Definition

The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

+ References

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Number of shares of capital stock issued (purchased by employees) in connection with an employee stock ownership plan.

+ References

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- Definition

Number of new stock issued during the period.

+ References

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-Name Accounting Standards Codification

-Topic 505

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-Name Regulation S-X (SX)

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Stock Options - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive Stock Option Plans, Options granted		20,000	729,000
Number of shares received upon exercise of stock options	49,638
Value of shares received upon exercise of stock options	$ 1,651
Weighted Average Grant-Date Fair Value, Granted	$ 21.51
Number of forfeited common stock that is granted	1,367
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Vesting period			3 years
Number of common and restricted stock issued to employees and non-executive board members			50,877
The total fair value recognized over the related service periods			401
Number of forfeited common stock that is granted			22,558
Restricted Stock \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Vesting period	3 years	3 years
Number of common and restricted stock issued to employees and non-executive board members	248,536	35,640
The total fair value recognized over the related service periods	5,346	411
Number of forfeited common stock that is granted	1,367	5,556
Restricted Stock \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted			6.86
Restricted Stock \| Minimum \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted	$ 13.34	11.26
Restricted Stock \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted			8.32
Restricted Stock \| Maximum \| Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant-Date Fair Value, Granted	$ 34.04	12.89
Incentive Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential number of common stock issued under company's ISOP	4,296,000
Option Exercisable Maximum Period	10 years
Option Exercise Price as Percentage of Fair Value of Common Stock	10.00%
Option Exercise Price as Percentage of Fair Value of Common Stock	110.00%
Total intrinsic value of options exercised	15,910	4	260
Cash received from stock option exercised	$ 2,996	414	284
Incentive Stock Option Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Vesting period	3 years
Incentive Stock Option Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Vesting period	5 years
Incentive Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Vesting period			3 years
Incentive Stock Option Plans, Options granted	0	20,000	729,000
Vesting Description		One third of the total option shares vest