Compensation Expense Related Stock Options Recognized

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- Definition

Employee Service Share Based Compensation Related To Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition

+ References

No definition available.

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- Definition

The maximum vesting percentage of total shares granted.

+ References

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award, Options, Vesting Period

+ References

No definition available.

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- Definition

Share Based Compensation Arrangement by Share Based Payment Award Other Than Options Expected Vesting Period

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No definition available.

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- Definition

Share Based Compensation Arrangement by Share Based Payment Awards Performance Period

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award, Vest And Exercisable Date

+ References

No definition available.

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- Definition

Share Based Compensation Arrangement by Share based Payment Award, Vesting Percentage

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No definition available.

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- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

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-Number 123R

-Paragraph A240

-Subparagraph h

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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.

+ References

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-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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-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

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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 estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)(iii)

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-Number 123R

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-Subparagraph e(2)(c)

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- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.D.2)

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-SubTopic 10

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-Subparagraph (f)(2)(i)

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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-Topic 718

-SubTopic 10

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-Paragraph 2

-Subparagraph (f)(2)(ii)

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)(iv)

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-Number 123R

-Paragraph A240

-Subparagraph e(2)(d)

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- Definition

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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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

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- Definition

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

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(1)

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-Number 123R

-Paragraph A240

-Subparagraph b(1)(d)

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph c(1)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)(1)

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- Definition

Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Number of share instruments newly issued under a share-based compensation plan.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

+ References

No definition available.

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- Definition

Value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of stock value of such awards forfeited. Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-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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-Name Accounting Standards Codification

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-Subparagraph (d)(1)

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 10

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30, 31

-Article 5

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Share-Based Compensation - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended										12 Months Ended			6 Months Ended		1 Months Ended			6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Performance Share Plan 2012	Jun. 30, 2012 Performance Share Plan 2012 Minimum	Jun. 30, 2012 Performance Share Plan 2012 Maximum	Jun. 30, 2011 Performance Share Plan 2011	Jun. 30, 2011 Performance Share Plan 2011 Minimum	Jun. 30, 2011 Performance Share Plan 2011 Maximum	Jun. 30, 2012 Performance Share Plan 2012 And 2011 Maximum	Jun. 30, 2012 Performance Share Plan 2008	Dec. 31, 2008 Performance Share Plan 2008	Dec. 31, 2008 Performance Share Plan 2008 Minimum	Dec. 31, 2008 Performance Share Plan 2008 Maximum	Jun. 30, 2012 Stock Options	Jun. 30, 2011 Stock Options	Apr. 30, 2010 Performance Shares	Apr. 30, 2010 Performance Shares Stock Price At Specified Percentage Above Grant Date Stock Price	Apr. 30, 2010 Performance Shares Attainment Of Earnings Per Share Goals	Jun. 30, 2012 Unvested Restricted Awards	Jun. 30, 2011 Unvested Restricted Awards	Jun. 30, 2012 Unvested Restricted Awards Certain key Employees	Jun. 30, 2011 Unvested Restricted Awards Certain key Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 5,000,000	$ 4,300,000	$ 8,626,000	$ 8,644,000
Share-based compensation related to expensing the fair value of stock options	1,900,000	1,900,000	3,000,000	3,800,000
Shares of common stock issued to certain key employees and non-management members of Board of Directors																					342,074	200,796
Value of common stock issued to certain key employees and non-management members of Board of Directors																					7,400,000	3,500,000
Stock bonus awards vesting period																							3 years	3 years
Unrecognized compensation cost related to non vested share-based compensation arrangements																$ 8,100,000					$ 8,900,000
Unrecognized compensation cost related to non vested share-based compensation arrangements, remaining weighted average recognition period																1 year 8 months 12 days					2 years 1 month 6 days
Authorized shares of non vested stock to key executives					241,095			263,292					182,816
Performance shares grant expected vesting period						2012	2014		2011	2013				2008	2014
Percentage of performance shares grant expected to vest					200.00%			200.00%					100.00%
Unrecognized compensation cost related to nonvested share-based compensation arrangements, recognition period											2014	2012
Performance shares grant performance period													1 year
Performance shares grant vesting period													7 years
Percentage of performance shares that will vest per year, up to a maximum of 100% of the total grant, when the earnings per share goal is attained													20.00%
Number of options granted																818,090	716,508	1,400,000
Average fair value of option grant																$ 5.27	$ 5.78	$ 3.48
Exercise price																$ 22.95	$ 17.61	$ 16.19
Risk-free interest rate																1.69%	2.96%	2.07%
Expected volatility																24.11%	30.00%	30.00%
Expected term																7 years 329 days	8 years 183 days	4 years
Dividend yield																1.75%	1.59%	1.79%
Grant vesting period																3 years	3 years
Share based compensation arrangement by share based payment award, vest and exercisable date																			Apr. 30, 2013	Dec. 31, 2012