Convertible Senior Notes (Details) (USD $)	1 Months Ended	9 Months Ended
Nov. 30, 2013	Mar. 30, 2014
Debt Instrument [Line Items]
Principal amount	$ 175,000,000	$ 175,000,000
Debt Instrument, Interest Rate, Stated Percentage	1.75%
Debt Instrument, Maturity Date	Nov. 15, 2018
Debt instrument, convertible notes, percentage of principal amount	100.00%	100.00%
Debt Instrument, Term		4 years 7 months 16 days
Debt Instrument, Convertible, Conversion Price		$ 10.30
Debt Instrument, Convertible, Conversion Ratio		97.13
Debt Instrument, Convertible, Terms of Conversion Feature		1000
Debt Instrument, Unamortized Discount		32,000,000
Debt Issuance Cost		5,300,000
Debt Issuance Costs, Gross		4,300,000
Issuance costs, equity component	1,000,000
Debt Issuance Costs, Net		4,100,000
Debt Instrument, Fair Value Disclosure		$ 175,100,000
Conversion Event 1 [Member]
Debt Instrument [Line Items]
Debt Instrument, Convertible, Threshold Trading Days		20
Debt Instrument, Convertible, Threshold Consecutive Trading Days		30 days
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger		130.00%
Conversion Event 2 [Member]
Debt Instrument [Line Items]
Debt Instrument, Convertible, Terms of Conversion Feature		1000
Debt Instrument, Convertible, Threshold Trading Days		5
Debt Instrument, Convertible, Threshold Consecutive Trading Days		5 days
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger		98.00%

Percentage of the principal amount of the convertible notes

No definition available.

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- Definition

Transaction costs associated with the issuance of the convertible debt that have been allocated to equity.

+ References

No definition available.

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- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

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-SubTopic 20

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- Definition

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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-Glossary Conversion Rate

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- Definition

Description of the conversion terms of a debt instrument which may include the conversion ratio (including all potential conversion ratios if contingently adjustable), type of debt or equity security into which the debt is convertible, the dollars of debt or the number of shares into which the instrument is convertible (or potentially convertible into), the conversion period, any contingencies associated with the conversion terms, and the existence and amount of a beneficial conversion feature.

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- Definition

Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instruments must exceed threshold percentage for a specified number of trading days to trigger conversion feature, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

+ References

No definition available.

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Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

+ References

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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- Definition

Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees).

+ References

No definition available.

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Amount of issuance costs recognized in a share-lending arrangement entered into by the entity, in contemplation of a convertible debt offering or other financing, before deduction of accumulated amortization or effects of subsequent adjustments.

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Amount of issuance costs recognized in a share-lending arrangement entered into by the entity, in contemplation of a convertible debt offering or other financing, after deduction of accumulated amortization or the effects of subsequent adjustments.

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