Share-based Compensation (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
Jun. 30, 2012
Stock Based Compensation (Textual) [Abstract]
Vesting period of performance shares	2 years
Stock option granted	0
Restricted Stock [Member]
Stock Based Compensation (Textual) [Abstract]
Unrecognized stock based compensation expense related to non-vested restricted stock	1.5
Weighted-average vesting period	2 years 3 months 18 days
Stock Settled Stock Appreciation Rights (SSARS) [Member]
Stock Based Compensation (Textual) [Abstract]
Unrecognized stock based compensation expense related to non-vested stock options	1.9
Shares withheld to cover the employee's minimum applicable income taxes	5,146
Weighted-average vesting period	2 years 6 months
Total treasury shares to settle SSARs	9,709
Performance Shares [Member]
Stock Based Compensation (Textual) [Abstract]
Compensation expense	0.1
Weighted-average vesting period	1 year 10 months 24 days
2011 Stock Incentive Plan [Member]
Stock Based Compensation (Textual) [Abstract]
Shares authorized under 2011 Stock incentive plan	3,000,000
2011 Stock Incentive Plan [Member] \| Restricted Shares and Restricted Share Units [Member]
Stock Based Compensation (Textual) [Abstract]
Shares authorized under 2011 Stock incentive plan	1,000,000
Maximum number of shares subject to stock options and restricted shares	400,000
2011 Stock Incentive Plan [Member] \| Stock Settled Stock Appreciation Rights (SSARS) [Member]
Stock Based Compensation (Textual) [Abstract]
Maximum number of shares subject to stock options and restricted shares	800,000

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Stock issued during period shares stock settled stock appreciation rights exercised treasury stock reissued.

+ References

No definition available.

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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

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)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Aggregate unrecognized cost of share-based awards, other than options, made to employees under an equity-based compensation plan, that have yet to vest.

+ References

No definition available.

+ Details

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- Definition

Aggregate unrecognized cost of option awards made to employees under a stock option plan or plans, that have yet to vest.

+ References

No definition available.

+ Details

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- Definition

Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition.

+ References

No definition available.

+ Details

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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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The highest quantity of shares an employee can purchase under the plan per period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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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).

+ 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

-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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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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

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

+ References

No definition available.

+ Details

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