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Other Intangible Assets - Components of Gross and Net Acquired Intangible Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Sep. 30, 2017 | Jun. 24, 2017
--- | --- | --- | ---
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross | $ 233,100 | $ 201,100 | $ 170,500
Accumulated Amortization | (67,300) | (57,800) | (53,300)
Accumulated Impairment | (27,200) | (27,200) | (27,200)
Net Carrying Value | 138,610 | 116,067 | 90,004
Marketing-related intangible assets |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross | 87,500 | 79,600 | 77,600
Accumulated Amortization | (13,800) | (12,700) | (11,900)
Accumulated Impairment | (26,000) | (26,000) | (26,000)
Net Carrying Value | 47,700 | 40,900 | 39,700
Other acquired intangible assets |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross | 29,900 | 29,900 | 28,600
Accumulated Amortization | (13,800) | (12,900) | (12,400)
Accumulated Impairment | (1,200) | (1,200) | (1,200)
Net Carrying Value | 14,900 | 15,800 | 15,000
Amortizable | Marketing-related intangible assets |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross | 16,900 | 16,900 | 14,900
Accumulated Amortization | (13,800) | (12,700) | (11,900)
Accumulated Impairment | 0 | 0 | 0
Net Carrying Value | 3,100 | 4,200 | 3,000
Amortizable | Customer-related intangible assets |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross | 115,700 | 91,600 | 64,300
Accumulated Amortization | (39,700) | (32,200) | (29,000)
Accumulated Impairment |  | 0 | 0
Net Carrying Value | 76,000 | 59,400 | 35,300
Amortizable | Other acquired intangible assets |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross | 22,100 | 22,100 | 20,800
Accumulated Amortization | (13,800) | (12,900) | (12,400)
Accumulated Impairment |  | 0 | 0
Net Carrying Value | 8,300 | 9,200 | 8,400
Nonamortizable | Marketing-related intangible assets |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross | 70,600 | 62,700 | 62,700
Accumulated Amortization | 0 | 0 | 0
Accumulated Impairment | (26,000) | (26,000) | (26,000)
Net Carrying Value | 44,600 | 36,700 | 36,700
Nonamortizable | Other acquired intangible assets |  |  |
Acquired Indefinite-lived Intangible Assets [Line Items] |  |  |
Gross | 7,800 | 7,800 | 7,800
Accumulated Amortization |  | 0 | 0
Accumulated Impairment | (1,200) | (1,200) | (1,200)
Net Carrying Value | $ 6,600 | $ 6,600 | $ 6,600

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