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Debt Schedule of Debt (Details) - USD ($) | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Oct. 29, 2016 | Oct. 24, 2015 | Jul. 30, 2016 | Sep. 15, 2015 | Sep. 09, 2015
Debt Instrument [Line Items] |  |  |  |  |
Amortization of debt discount | $ 4,307,000 | $ 1,780,000 |  |  |
Debt and capital lease obligations | 792,001,000 |  | $ 719,327,000 |  |
Less: current portion | (17,500,000) |  | (13,125,000) |  |
Long-term debt | 774,501,000 |  | 706,202,000 |  |
0.75% Convertible Senior Notes Due 2021 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amortization of debt discount | 4,300,000 | $ 1,800,000 |  |  |
Long-term Debt, Fair Value | 413,300,000 |  | 458,700,000 |  |
Debt Instrument, Face Amount | $ 485,000,000 |  | $ 485,000,000 | $ 485,000,000 |
Debt, interest rate (in percent) | 0.75% | 0.75% | 0.75% |  |
Debt and capital lease obligations | $ 377,751,000 |  | $ 373,077,000 |  |
Convertible Debt | 377,751,000 |  | 373,077,000 |  |
Debt Instrument, Unamortized Discount | 97,372,000 |  | 101,679,000 |  |
Unamortized Debt Issuance Expense | $ 9,877,000 |  | $ 10,244,000 | 15,100,000 |
7.125% Senior Subordinated Notes Due 2021 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt, interest rate (in percent) | 7.125% |  | 7.125% |  |
Credit Agreement - Revolving facility (matures April 2020) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt and capital lease obligations | $ 68,000,000 |  | $ 0 |  |
Credit Agreement - Term Loan (matures April 2020) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  | $ 350,000,000
Debt and capital lease obligations | 346,250,000 |  | $ 346,250,000 |  |
0.75% Convertible Notes Liability Component [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amortization of debt discount | $ 400,000 | $ 100,000 |  |  |
Unamortized Debt Issuance Expense |  |  |  | $ 11,500,000 |
Incremental Facility, Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  | $ 150,000,000

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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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