Debt Instrument, Comparable Yield

No definition available.

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- Definition

Debt Instrument, Convertible, Conversion Price, Threshold Trigger Price

+ References

No definition available.

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- Definition

Debt Instrument, Convertible, Measurement Period, Threshold Percentage of Product of Sale Price of Common Stock and Applicable Conversion Rate

+ References

No definition available.

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- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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- Definition

Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

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- Definition

The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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- Definition

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

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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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- Definition

Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

+ References

No definition available.

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- Definition

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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- Definition

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.

+ Details

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- Definition

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

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- Definition

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

+ References

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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.

+ References

No definition available.

+ Details

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- Definition

Amount, after accumulated amortization, of debt discount.

+ References

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- Definition

The cash outflow for a financial contract that meets the hedge criteria as either cash flow hedge, fair value hedge or hedge of net investment in foreign operations.

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- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

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- Definition

Number of shares that have been repurchased and retired during the period.

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- Definition

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

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Debt - Convertible Senior Notes Due 2021 (Details)			3 Months Ended			6 Months Ended	12 Months Ended
Debt - Convertible Senior Notes Due 2021 (Details)	Sep. 15, 2015 USD ($) $ / shares	Sep. 09, 2015 USD ($) shares	Apr. 29, 2017 shares	Jan. 28, 2017 shares	Oct. 24, 2015 trading_day	Jan. 27, 2018 USD ($) shares	Jan. 26, 2019 USD ($)	Jul. 29, 2017 USD ($) shares	Jul. 30, 2016 USD ($) shares	Jul. 15, 2015 USD ($)
Debt Instrument [Line Items]
Amortization of debt discount						$ 9,170,000	$ 19,103,000	$ 17,610,000	$ 14,709,000
Stock Repurchased and Retired During Period, Value		$ 60,000,000				$ 16,875,000		$ 62,909,000	$ 169,997,000
Repurchase of common stock, shares \| shares		805,000	400,000	313,006		200,000		713,006	2,511,578
Payments for Hedge, Financing Activities						$ 0	0	$ 0	$ 115,818,000
0.75% Convertible Senior Notes Due 2021
Debt Instrument [Line Items]
Debt instrument, face amount	$ 485,000,000.0					$ 485,000,000	$ 485,000,000
Debt, interest rate (in percent)						0.75%	0.75%	0.75%	0.75%
Debt Conversion, Converted Instrument, Amount	$ 1,000
Debt instrument conversion ratio	10.3211
Debt instrument, convertible, conversion price (per share) \| $ / shares	$ 96.89
Convertible debt, trading day threshold \| trading_day					20
Convertible debt, consecutive trading day threshold \| trading_day					30
Convertible debt, percentage of stock trigger price threshold					130.00%
Debt Instrument, Convertible, Conversion Price, Threshold Trigger Price \| $ / shares	$ 125.96
Convertible debt, measurement period for percentage of product sale price of common stock and applicable conversion threshold					98.00%
Convertible debt, comparable yield							5.50%
Amortization of debt discount						$ 9,200,000	$ 19,100,000	$ 17,600,000	$ 14,700,000
Convertible Debt						402,249,000	423,199,000
Unamortized discount						74,899,000	55,795,000
Debt issuance cost						$ 7,852,000	$ 6,006,000
7.125% Senior Subordinated Notes
Debt Instrument [Line Items]
Debt instrument, face amount										$ 277,500,000.0
Debt, interest rate (in percent)						7.125%	7.125%	7.125%	7.125%	7.125%
Repayments of Debt	$ 296,600,000