Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Goodwill [Roll Forward]
December 31, 2017	$ 2,470,047	[1]
Acquisitions and related adjustments	216,468
Foreign currency translation adjustment	17,027
March 31, 2018	2,703,542	[1]
Goodwill, Impaired, Accumulated Impairment Loss	1,026,702
Global Components [Member]
Goodwill [Roll Forward]
December 31, 2017	1,264,869	[1]
Acquisitions and related adjustments	202,267
Foreign currency translation adjustment	4,565
March 31, 2018	1,471,701	[1]
Goodwill, Impaired, Accumulated Impairment Loss	716,925
Global ECS [Member]
Goodwill [Roll Forward]
December 31, 2017	1,205,178	[1]
Acquisitions and related adjustments	14,201
Foreign currency translation adjustment	12,462
March 31, 2018	1,231,841	[1]
Goodwill, Impaired, Accumulated Impairment Loss	$ 309,777

[1] The total carrying value of goodwill for all periods in the table above is reflected net of $1,026,702 of accumulated impairment charges, of which $716,925 was recorded in the global components business segment and $309,777 was recorded in the global ECS business segment.