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Consolidating Condensed Financial Information of Guarantor Subsidiaries - Consolidating Condensed Statement of Cash Flows (Details) - USD ($) $ in Thousands | 3 Months Ended
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Dec. 30, 2017 | Dec. 24, 2016
Condensed Financial Statements, Captions [Line Items] |  |
Net cash provided (used) by operating activities | $ (24,213) | $ (13,313)
Additions to property and equipment | (8,186) | (12,968)
Payments to acquire companies, net of cash acquired | 0 | (60,042)
Change in restricted cash and cash equivalents | 226 | (71)
Proceeds from sale of business, facility and other assets | 0 | 7,960
Investments | (6,555) | (2,000)
Other investing activities | (1,200) | (265)
Intercompany investing activities | 0 | 0
Net cash used in investing activities | (15,715) | (67,386)
Repayments on revolving line of credit | (23,000) | (1,000)
Borrowings under revolving line of credit | 23,000 | 1,000
Issuance of long-term debt | 300,000 | 0
Repayments under long-term debt | (7) | (74)
Payment of financing costs | (4,558) | 0
Excess tax benefits from stock-based awards | 0 | 4,356
Repurchase of common stock | (2,768) | (7,913)
Distribution to parent | 0 | 0
Distribution to noncontrolling interest | (1,597) | (1,018)
Payment of contingent consideration liability | (93) | (860)
Intercompany financing activities | 0 | 0
Net cash provided (used) by financing activities | 290,977 | (5,509)
Effect of exchange rate changes on cash and cash equivalents | 20 | (193)
Net increase (decrease) in cash and cash equivalents | 251,069 | (86,401)
Cash and equivalents at beginning of period | 32,397 | 92,982
Cash and equivalents at end of period | 283,466 | 6,581
Reportable Legal Entities |  |
Condensed Financial Statements, Captions [Line Items] |  |
Investments |  |
Eliminations |  |
Condensed Financial Statements, Captions [Line Items] |  |
Net cash provided (used) by operating activities | (6,387) | (4,076)
Additions to property and equipment |  | 0
Payments to acquire companies, net of cash acquired |  | 0
Change in restricted cash and cash equivalents | 0 | 0
Investments | 0 |
Other investing activities | 0 |
Intercompany investing activities | 18,193 | 24,995
Net cash used in investing activities | 18,193 | 24,995
Repayments on revolving line of credit | 0 | 0
Borrowings under revolving line of credit | 0 | 0
Issuance of long-term debt | 0 |
Repayments under long-term debt | 0 | 0
Payment of financing costs | 0 |
Excess tax benefits from stock-based awards |  | 0
Repurchase of common stock | 0 |
Distribution to parent | 6,387 | 4,076
Distribution to noncontrolling interest | 0 | 0
Payment of contingent consideration liability | 0 | 0
Intercompany financing activities | (18,193) | (24,995)
Net cash provided (used) by financing activities | (11,806) | (20,919)
Effect of exchange rate changes on cash and cash equivalents | 0 | 0
Net increase (decrease) in cash and cash equivalents | 0 | 0
Cash and equivalents at beginning of period | 0 | 0
Cash and equivalents at end of period | 0 | 0
Parent | Reportable Legal Entities |  |
Condensed Financial Statements, Captions [Line Items] |  |
Net cash provided (used) by operating activities | (38,709) | (27,540)
Additions to property and equipment | (1,608) | (1,831)
Payments to acquire companies, net of cash acquired |  | (60,042)
Change in restricted cash and cash equivalents | 226 | (71)
Proceeds from sale of business, facility and other assets |  | 2
Investments | (6,555) | (2,000)
Other investing activities | (1,200) | (265)
Intercompany investing activities | (2,351) | (5,781)
Net cash used in investing activities | (11,488) | (69,988)
Repayments on revolving line of credit | (23,000) | (1,000)
Borrowings under revolving line of credit | 23,000 | 1,000
Issuance of long-term debt | 300,000 |
Repayments under long-term debt | 0 | (66)
Payment of financing costs | (4,558) |
Excess tax benefits from stock-based awards |  | 4,356
Repurchase of common stock | (2,768) | (7,913)
Distribution to parent |  | 0
Distribution to noncontrolling interest |  | 0
Payment of contingent consideration liability |  | 0
Intercompany financing activities | 15,833 | 21,223
Net cash provided (used) by financing activities | 308,507 | 17,600
Effect of exchange rate changes on cash and cash equivalents | 60 | (458)
Net increase (decrease) in cash and cash equivalents | 258,370 | (80,386)
Cash and equivalents at beginning of period | 19,238 | 82,158
Cash and equivalents at end of period | 277,608 | 1,772
Non- Guarantor Subsidiaries | Reportable Legal Entities |  |
Condensed Financial Statements, Captions [Line Items] |  |
Net cash provided (used) by operating activities | (105) | (4,428)
Additions to property and equipment | (83) | (110)
Payments to acquire companies, net of cash acquired |  | 0
Change in restricted cash and cash equivalents | 0 | 0
Investments | 0 |
Other investing activities | 0 |
Intercompany investing activities | 0 | 0
Net cash used in investing activities | (83) | (110)
Repayments on revolving line of credit | 0 | 0
Borrowings under revolving line of credit | 0 | 0
Issuance of long-term debt | 0 |
Repayments under long-term debt | 0 | 0
Payment of financing costs | 0 |
Excess tax benefits from stock-based awards |  | 0
Repurchase of common stock | 0 |
Distribution to parent | (6,387) | (4,076)
Distribution to noncontrolling interest | (1,597) | (1,018)
Payment of contingent consideration liability | 0 | 0
Intercompany financing activities | 2,360 | 3,772
Net cash provided (used) by financing activities | (5,624) | (1,322)
Effect of exchange rate changes on cash and cash equivalents | (23) | 162
Net increase (decrease) in cash and cash equivalents | (5,835) | (5,698)
Cash and equivalents at beginning of period | 11,693 | 9,695
Cash and equivalents at end of period | 5,858 | 3,997
Guarantor Subsidiaries | Reportable Legal Entities |  |
Condensed Financial Statements, Captions [Line Items] |  |
Net cash provided (used) by operating activities | 20,988 | 22,731
Additions to property and equipment | (6,495) | (11,027)
Payments to acquire companies, net of cash acquired |  |
Change in restricted cash and cash equivalents |  | 0
Proceeds from sale of business, facility and other assets |  | 7,958
Investments |  |
Other investing activities | 0 |
Intercompany investing activities | (15,842) | (19,214)
Net cash used in investing activities | (22,337) | (22,283)
Repayments on revolving line of credit | 0 |
Borrowings under revolving line of credit | 0 | 0
Issuance of long-term debt | 0 |
Repayments under long-term debt | (7) | (8)
Payment of financing costs | 0 |
Excess tax benefits from stock-based awards |  | 0
Repurchase of common stock | 0 | 0
Distribution to parent | 0 | 0
Distribution to noncontrolling interest | 0 | 0
Payment of contingent consideration liability | (93) | (860)
Intercompany financing activities |  | 0
Net cash provided (used) by financing activities | (100) | (868)
Effect of exchange rate changes on cash and cash equivalents | (17) | 103
Net increase (decrease) in cash and cash equivalents | (1,466) | (317)
Cash and equivalents at beginning of period | 1,466 | 1,129
Cash and equivalents at end of period | $ 0 | $ 812

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