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Business Segment Data - Financial Information Relating to Company's Business Segments (Detail) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 24, 2016 USD ($) JointVenture | Jun. 25, 2016 USD ($) | Mar. 26, 2016 USD ($) | Dec. 26, 2015 USD ($) | Sep. 26, 2015 USD ($) | Jun. 27, 2015 USD ($) | Mar. 28, 2015 USD ($) | Dec. 27, 2014 USD ($) | Sep. 24, 2016 USD ($) JointVenture | Sep. 26, 2015 USD ($) | Sep. 27, 2014 USD ($) | Dec. 30, 2014 JointVenture
Net sales: |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 413,412 | $ 514,544 | $ 541,249 | $ 359,812 | $ 386,369 | $ 459,446 | $ 497,602 | $ 307,320 | $ 1,829,017 | $ 1,650,737 | $ 1,604,357 |
Income (loss) from operations: |  |  |  |  |  |  |  |  |  |  |  |
Operating income (loss) |  |  |  |  |  |  |  |  | 129,358 | 91,435 | 56,213 |
Interest expense |  |  |  |  |  |  |  |  | (42,847) | (40,027) | (42,844) |
Interest income |  |  |  |  |  |  |  |  | 140 | 129 | 94 |
Other income (expense) |  |  |  |  |  |  |  |  | (17,013) | 13 | 403 |
Income before income taxes and noncontrolling interest |  |  |  |  |  |  |  |  | 69,638 | 51,550 | 13,866 |
Income tax expense |  |  |  |  |  |  |  |  | 24,053 | 18,535 | 4,045 |
Net income including noncontrolling interest |  |  |  |  |  |  |  |  | 45,585 | 33,015 | 9,821 |
Net income attributable to noncontrolling interest |  |  |  |  |  |  |  |  | 1,071 | 1,044 | 1,017 |
Net income attributable to Central Garden & Pet Company | (5,611) | $ 26,030 | $ 32,697 | $ (8,602) | (4,369) | $ 18,800 | $ 23,237 | $ (5,697) | 44,514 | 31,971 | 8,804 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Total assets | 1,212,193 |  |  |  | 1,131,597 |  |  |  | 1,212,193 | 1,131,597 | 1,148,727 |
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 40,001 | 33,703 | 35,781 |
Expenditures for long-lived assets: |  |  |  |  |  |  |  |  |  |  |  |
Expenditures for long-lived assets |  |  |  |  |  |  |  |  | 27,622 | 22,030 | 17,173 |
Indefinite-lived intangible assets, impairment charge | 1,800 |  |  |  | 7,300 |  |  |  | 1,800 | 7,300 |  |
Non-cash impairment charge | $ 16,600 |  |  |  |  |  |  |  | $ 19,367 | 7,272 | 5,870 |
Number of joint ventures | JointVenture | 2 |  |  |  |  |  |  |  | 2 |  |  |
Purishield LLC and Ceregenin LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |
Expenditures for long-lived assets: |  |  |  |  |  |  |  |  |  |  |  |
Non-cash impairment charge |  |  |  |  |  |  |  |  | $ 16,600 |  |  |
Number of joint ventures | JointVenture |  |  |  |  |  |  |  |  |  |  |  | 2
Operating Segments [Member] | Pet Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |
Net sales: |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,081,853 | 894,549 | 845,505 |
Income (loss) from operations: |  |  |  |  |  |  |  |  |  |  |  |
Operating income (loss) |  |  |  |  |  |  |  |  | 119,930 | 98,798 | 88,077 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Total assets | $ 508,879 |  |  |  | 465,171 |  |  |  | 508,879 | 465,171 | 414,279 |
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 22,556 | 15,885 | 17,256 |
Expenditures for long-lived assets: |  |  |  |  |  |  |  |  |  |  |  |
Expenditures for long-lived assets |  |  |  |  |  |  |  |  | 18,939 | 17,060 | 8,561 |
Indefinite-lived intangible assets, impairment charge |  |  |  |  |  |  |  |  | 1,800 | 7,300 |  |
Operating Segments [Member] | Garden Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |
Net sales: |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 747,164 | 756,188 | 758,852 |
Income (loss) from operations: |  |  |  |  |  |  |  |  |  |  |  |
Operating income (loss) |  |  |  |  |  |  |  |  | 70,317 | 60,145 | 41,020 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Total assets | 304,901 |  |  |  | 310,981 |  |  |  | 304,901 | 310,981 | 337,461 |
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 6,098 | 5,988 | 6,793 |
Expenditures for long-lived assets: |  |  |  |  |  |  |  |  |  |  |  |
Expenditures for long-lived assets |  |  |  |  |  |  |  |  | 4,750 | 2,432 | 5,541 |
Charge related to new products |  |  |  |  |  |  |  |  |  |  | 16,900 |
Gain from sale of manufacturing plant assets |  |  |  |  |  |  |  |  |  |  | 4,900 |
Corporate [Member] |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from operations: |  |  |  |  |  |  |  |  |  |  |  |
Operating income (loss) |  |  |  |  |  |  |  |  | (60,889) | (67,508) | (72,884) |
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Total assets | $ 398,413 |  |  |  | $ 355,445 |  |  |  | 398,413 | 355,445 | 396,987 |
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 11,347 | 11,830 | 11,732 |
Expenditures for long-lived assets: |  |  |  |  |  |  |  |  |  |  |  |
Expenditures for long-lived assets |  |  |  |  |  |  |  |  | $ 3,933 | $ 2,538 | $ 3,071 |

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