Deferred Compensation Arrangement With Individual Share Based Payments.

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Disclosure Of Incentive Compensation Plan.

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- Definition

Vesting period for restriced stock units, Granted.

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Description of the period of time over 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, which may be expressed in a variety of ways (for example, in years, month and year).

+ References

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

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The quantity of shares issuable on stock options awarded under the plan during the reporting period.

+ 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(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

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

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Number of shares issued during the period as a result of any share-based compensation plan other than an employee stock ownership plan (ESOP).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 129
-Paragraph 5

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Disclosure of Incentive Compensation Plan (Details Textual) (USD $)	6 Months Ended		12 Months Ended	1 Months Ended			6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2008	Apr. 30, 2009 Long Term Incentive Plan 2009 To 2011 [Member]	Mar. 31, 2010 Long Term Incentive Plan 2010 To 2012 [Member]	Feb. 28, 2011 Long Term Incentive Plan 2011 To 2013 [Member]	Jun. 30, 2011 Long Term Incentive Plan 2011 To 2013 [Member]
Deferred Compensation Arrangement with Individual, Share Based Payments (Textuals) [Abstract]
Stock options which vest				one-third each year	one-third each year	one-third each year
Stock options granted				1,155,000	303,120		311,670
Disclosure of Incentive Compensation Plan (Textuals) [Abstract]
Weighted-average fair value of options granted	$ 11.57	$ 9.01
Units earned in 2008			0
Vesting period for restricted stock units, granted	three to four years