Acquisitions and Divestitures - Divestitures (Details) - USD ($)						3 Months Ended								7 Months Ended	8 Months Ended	9 Months Ended	10 Months Ended	12 Months Ended
	Oct. 31, 2017	Dec. 30, 2016	Oct. 10, 2016	Sep. 09, 2016	Jul. 29, 2016	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Jul. 29, 2016	Sep. 09, 2016	Oct. 10, 2016	Oct. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of businesses, net of cash sold																			$ 21,795,000	$ 39,064,000
Income tax expense (benefit)																		$ 118,366,000	118,016,000	97,403,000
Revenues						$ 614,094,000	$ 622,888,000	$ 634,360,000	$ 612,324,000	$ 585,904,000	$ 574,490,000	$ 573,366,000	$ 553,552,000					$ 2,483,666,000	2,287,312,000	2,113,043,000
Disposed of by Sale | Faure Herman
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of businesses, net of cash sold	$ 21,800,000
Pre-tax gain (loss) on the sale	9,300,000
Income tax expense (benefit)	$ 0
Revenues																	$ 14,100,000
Disposed of by Sale | Hydra-Stop
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of businesses, net of cash sold					$ 15,000,000
Pre-tax gain (loss) on the sale					5,800,000
Income tax expense (benefit)																				2,800,000
Revenues														$ 7,500,000
Additional proceeds from disposition of business					$ 1,000,000
Possible additions																			$ 1,000,000
Disposed of by Sale | Melles Griot KK
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of businesses, net of cash sold				$ 17,500,000
Pre-tax gain (loss) on the sale				$ (7,900,000)
Income tax expense (benefit)																				(3,400,000)
Revenues															$ 13,100,000
Disposed of by Sale | IETG and 40Seven
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of businesses, net of cash sold			$ 2,700,000
Pre-tax gain (loss) on the sale			$ (4,200,000)
Revenues																$ 8,300,000
Disposed of by Sale | CVI Korea
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of businesses, net of cash sold		$ 3,800,000
Pre-tax gain (loss) on the sale		$ (16,000,000)
Income tax expense (benefit)																				$ (9,100,000)
Revenues																					$ 11,700,000