Share based compensation arrangement award other than options outstanding weighted average grant date fair value.

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options nonvested.

+ Details

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- Definition

The number of vested and outstanding awards on non-stock option plans.

+ Details

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- Definition

The weighted average fair value as of the grant date of share based award plans other than stock option plans that were vested and outstanding as of the balance sheet date.

+ Details

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- Definition

Share based compensation arrangement by share based payment award other than options outstanding number.

+ Details

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- Definition

Share-Based Compensation.

+ Details

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64
-Subparagraph b

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph g(1)

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
-Section F

+ Details

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- Definition

The number of shares under a share-based award plan other than a stock option plan that were settled during the reporting period due to a failure to satisfy vesting conditions pertaining to all option plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(e)

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
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- Definition

The weighted average fair value as of the grant date of share-based award plans other than stock option plans that were not exercised or put into effect during the reporting period as a result of the occurrence of a terminating event specified in the contractual agreement of the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(e)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriodWeightedAverageGrantDateFairValue
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Data Type:	us-types:perShareItemType
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Period Type:	instant

- Definition

The number of shares issuable under a share-based award plan pertaining to grants made during the period on other than stock option plans (for example, phantom stock plan, stock appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(c)

+ Details

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Data Type:	xbrli:sharesItemType
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(c)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph c(1)

+ Details

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Data Type:	us-types:perShareItemType
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- Definition

The number of outstanding awards on nonstock option plans (for example, phantom stock plan, stock appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(a)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(b)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted average fair value of nonvested awards on share-based plans excluding option plans (for example, phantom stock plan, stock appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(a)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(b)

+ Details

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Namespace Prefix:	us-gaap
Data Type:	us-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The decrease in the number of shares potentially issuable under a share-based award plan pertaining to awards for which the grantee has gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares, other instruments, or cash in accordance with the terms of the arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(d)

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The weighted average fair value as of grant dates pertaining to a share-based award plan other than a stock option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares, other instruments, or cash in accordance with the terms of the arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(d)

+ Details

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Share-Based Compensation (Details 1) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Share-Based Compensation (Textuals)
Total share-based compensation expense	$ 3,181	$ 3,139	$ 6,617	$ 6,365
RSUs [Member]
Summarized information on unvested restricted stock units (RSUs), performance shares and deferred shares
Unvested, Shares, Beginning balance			594
Unvested, Weighted-average grant-date fair value, Beginning balance			$ 29.06
Forfeited, Shares			(33)
Forfeited, Weighted-average grant-date fair value	$ 46.70		$ 46.70
Granted, Shares			280
Granted, Weighted-average grant-date fair value			$ 32.93
Vested, Shares			(112)
Vested, Weighted-average grant-date fair value			$ 28.13
Unvested, Shares, Ending balance	729		729
Unvested, Weighted-average grant-date fair value, Ending balance	$ 30.63		$ 30.63
Performance Shares [Member]
Summarized information on unvested restricted stock units (RSUs), performance shares and deferred shares
Unvested, Shares, Beginning balance			742
Unvested, Weighted-average grant-date fair value, Beginning balance			$ 31.15
Forfeited, Shares			(84)
Forfeited, Weighted-average grant-date fair value	$ 30.18		$ 30.18
Granted, Shares			246
Granted, Weighted-average grant-date fair value			$ 39.77
Vested, Shares			(176)
Vested, Weighted-average grant-date fair value			$ 29.00
Unvested, Shares, Ending balance	728		728
Unvested, Weighted-average grant-date fair value, Ending balance	$ 34.71		$ 34.71
Director Deferred Shares [Member]
Summarized information on unvested restricted stock units (RSUs), performance shares and deferred shares
Unvested, Shares, Beginning balance			14
Unvested, Weighted-average grant-date fair value, Beginning balance			$ 33.28
Granted, Shares			31
Granted, Weighted-average grant-date fair value			$ 33.98
Vested, Shares			(14)
Vested, Weighted-average grant-date fair value			$ 33.28
Unvested, Shares, Ending balance	31		31
Unvested, Weighted-average grant-date fair value, Ending balance	$ 33.98		$ 33.98
Vested, Shares, Ending balance	83		83
Vested Shares, Weighted Average grant-date fair value, ending balance	$ 33.87		$ 33.87
Outstanding, Shares, Ending balance	114		114
Outstanding Shares, Weighted Average grant-date fair value, ending balance	$ 33.90		$ 33.90