Share Based Awards (Details 5) (USD $)	12 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Restricted stock units award activity
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	1,636,176	1,370,101	1,159,183	988,337
Restricted Stock Units Award [Member]
Restricted stock units award activity
Number of Shares, Beginning of the year	64,571	30,385	30,001
Weighted average Grant Date Fair value Per Share, Beginning of the year	$ 20.74	$ 27.09	$ 36.32
Number of Shares Granted	48,414	57,324	18,939
Weighted average Grant Date Fair value Per Share, Granted	$ 15.77	$ 20.75	$ 19.32
Number of Shares Vested	(34,780)	(16,302)	(18,555)
Weighted average Grant Date Fair value Per Share, Vested	$ 21.33	$ 30.64	$ 32.14
Number of Shares Cancelled		(6,836)
Weighted average Grant Date Fair value Per Share, Cancelled		$ 22.59
Number of Shares, Ending of the year		64,571	30,385
Weighted average Grant Date Fair value Per Share Outstanding, Ending of the year	$ 17.94	$ 20.74	$ 27.09
Two Thousand Five Stock Options Plan [Member]
Restricted stock units award activity
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	1,636,176
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	78,205

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Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Nonvested Options Cancelled, Weighted Average Grant Date Fair Value

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

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

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit 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 or units.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

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

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- Definition

Number of shares under non-option equity instrument agreements for which rights to exercise lapsed.

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- Definition

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

+ 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 (c)(1)(i)

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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- Definition

Number of options outstanding, including both vested and non-vested options.

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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

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

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

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