Business Acquisitions and Divestiture - WIL Research Additional Information (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Apr. 04, 2016 |
Sep. 30, 2017 |
Sep. 24, 2016 |
Sep. 30, 2017 |
Sep. 24, 2016 |
Feb. 11, 2017 |
Feb. 10, 2017 |
Mar. 30, 2016 |
|
| Business Acquisition [Line Items] | ||||||||
| Credit facility | $ 1,650,000,000.00 | |||||||
| WIL Research | ||||||||
| Business Acquisition [Line Items] | ||||||||
| Purchase price | $ 604,800,000 | |||||||
| Assumed liabilities | 400,000 | |||||||
| Purchase price allocation | 577,391,000 | |||||||
| Cash acquired | $ 27,400,000 | |||||||
| Goodwill, expected tax deductible amount | $ 14,800,000 | $ 19,000,000 | ||||||
| Integration related costs and transaction costs | $ 400,000 | $ 1,300,000 | $ 1,600,000 | $ 13,700,000 | ||||
| Revenue | 57,400,000 | 112,600,000 | ||||||
| Operating income | $ 3,600,000 | 4,600,000 | ||||||
| Amortization of intangible assets and depreciation of fixed assets | 1,400,000 | |||||||
| Reversal of interest expense on borrowings | $ 2,700,000 | |||||||