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RESTATEMENT OF CONSOLIDATED FINANCIAL STATEMENTS (Statement of Operations) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2018 | Apr. 01, 2017 | Mar. 31, 2018 | Apr. 01, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Cost of sales | $ 122,325 | $ 107,350 | $ 238,814 | $ 188,562
Gross profit | 99,447 | 92,263 | 196,649 | 160,690
Selling, general and administrative | 32,354 | 30,740 | 60,147 | 58,603
Operating expenses | 61,011 | 55,760 | 119,054 | 105,128
Income from operations | 38,436 | 36,503 | 77,595 | 55,562
Income before income taxes | 41,152 | 37,821 | 82,020 | 57,790
Income tax expense | 4,800 | 5,151 | 115,212 | 7,724
Net income | $ 36,313 | $ 32,670 | $ (33,215) | $ 50,066
Net income per share: |  |  |  |
Basic (in dollars per share) | $ 0.52 | $ 0.46 | $ (0.47) | $ 0.71
Diluted (in dollars per share) | $ 0.51 | $ 0.45 | $ (0.47) | $ 0.69
As Previously Reported |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Cost of sales |  | $ 109,322 |  | $ 190,643
Gross profit |  | 90,291 |  | 158,609
Selling, general and administrative |  | 32,666 |  | 62,198
Operating expenses |  | 57,686 |  | 108,723
Income from operations |  | 32,605 |  | 49,886
Income before income taxes |  | 33,923 |  | 52,114
Income tax expense |  | 4,882 |  | 7,490
Net income |  | $ 29,041 |  | $ 44,624
Net income per share: |  |  |  |
Basic (in dollars per share) |  | $ 0.41 |  | $ 0.63
Diluted (in dollars per share) |  | $ 0.40 |  | $ 0.62
Effect of Restatement |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Cost of sales |  | $ (1,972) |  | $ (2,081)
Gross profit |  | 1,972 |  | 2,081
Selling, general and administrative |  | (1,926) |  | (3,595)
Operating expenses |  | (1,926) |  | (3,595)
Income from operations |  | 3,898 |  | 5,676
Income before income taxes |  | 3,898 |  | 5,676
Income tax expense |  | 269 |  | 234
Net income |  | $ 3,629 |  | $ 5,442
Net income per share: |  |  |  |
Basic (in dollars per share) |  | $ 0.05 |  | $ 0.08
Diluted (in dollars per share) |  | $ 0.05 |  | $ 0.07

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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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