The increase in quarterly share-based compensation attributable to grants made.

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- Definition

The period of time, from grant to expiration, of the share-based compensation award.

+ Details

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- Definition

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

+ Details

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- 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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- Definition

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)

+ Details

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- Definition

The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance 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)

+ Details

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Data Type:	us-types:perShareItemType
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ Details

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SUBSEQUENT EVENTS (Details 2) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	1 Months Ended		1 Months Ended
	Jun. 30, 2011	Jul. 31, 2011 Stock Option Employment agreement Chief executive officer and President	Jul. 25, 2011 Stock Option Employment agreement Chief executive officer and President	Jul. 31, 2011 Restricted Stock Unit Employment agreement Chief executive officer and President	Jul. 31, 2011 Employment agreement Chief executive officer and President Restricted stock units and performance shares	Jul. 31, 2011 Employment agreement Chief executive officer and President Performance units
Subsequent event
Stock options granted (in shares)	155,651	344,925
Stock options granted per share (in dollars per share)	$ 13.75		$ 13.74
Granted (in shares)	665,691			56,957		204,418
Term (in years)		10
Vesting period of stock options (in years)		4Y		4Y
Increase in future quarterly share-based compensation expense due to grants		$ 0.1			$ 0.3