Goodwill and Intangible Assets Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill Reclassification		$ 9,700,000
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 151,000,000	14,300,000
Adjustments to prior year acquisitions	700,000	0
Goodwill, Mergers & Acquisitions	8,800,000	137,000,000
Currency translations	(3,500,000)	(300,000)
Goodwill, ending balance	157,000,000	151,000,000	$ 14,300,000
Goodwill, Impairment Loss	0	0	0
IT Services and Hardware [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	148,800,000	12,100,000
Adjustments to prior year acquisitions	700,000	0
Goodwill, Mergers & Acquisitions	0	137,000,000
Currency translations	(3,500,000)	(300,000)
Goodwill, ending balance	146,000,000	148,800,000	12,100,000
Entertainment and Communications [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	2,200,000	2,200,000
Adjustments to prior year acquisitions	0	0
Goodwill, Mergers & Acquisitions	8,800,000	0
Currency translations	0	0
Goodwill, ending balance	$ 11,000,000	2,200,000	$ 2,200,000
SunTel Services [Member] | IT Services and Hardware [Member]
Goodwill [Roll Forward]
Goodwill, Mergers & Acquisitions		4,600,000
OnX Holdings LLC [Member] | IT Services and Hardware [Member]
Goodwill [Roll Forward]
Goodwill, Mergers & Acquisitions		$ 132,400,000