Restructuring, Integration, and Other Charges (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring, integration, and other charges	$ 91,294	$ 73,602	$ 68,765
Restructuring Charges 2017 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, integration, and other charges	46,816
Restructuring Charges 2017 Plan [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, integration, and other charges	37,615
Restructuring Charges 2017 Plan [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, integration, and other charges	8,192
Restructuring Charges 2017 Plan [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, integration, and other charges	1,009
Restructuring Charges 2016 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, integration, and other charges	5,777	32,894
Restructuring Charges 2016 Plan [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, integration, and other charges	6,498	25,763
Restructuring Charges 2016 Plan [Member] | Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, integration, and other charges	(525)	5,786
Restructuring Charges 2016 Plan [Member] | Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, integration, and other charges	(196)	1,345
Restructuring Charges 2015 Plan [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, integration, and other charges			39,119
Other Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, integration, and other charges	38,287	37,097	25,562
Restructuring Charges From Prior Periods [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, integration, and other charges	6,191	3,611	4,084
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Fraud Loss		4,329
Loss Contingency Accrual, Period Increase (Decrease)		2,376
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	7,658	8,705	$ 19,565
Settlement charge		12,211
Accrual for Environmental Loss Contingencies, Period Increase (Decrease)	2,071	11,771
Gain (Loss) on Disposition of Property Plant Equipment	3,144
Wyle Defined Benefit Plan [Member]
Restructuring Cost and Reserve [Line Items]
Settlement charge	$ (16,706)	$ (12,211)