Goodwill and Intangible Assets - Goodwill (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 151,000,000
Goodwill, Adjustments to prior year acquisitions	700,000
Goodwill, Currency translations	(1,000,000)
Goodwill, Ending Balance	150,700,000
Goodwill Reclassification			$ 9,700,000
Goodwill, Impairment Loss	0	$ 0
IT Services and Hardware [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	148,800,000
Goodwill, Adjustments to prior year acquisitions	700,000
Goodwill, Currency translations	(1,000,000)
Goodwill, Ending Balance	148,500,000
Entertainment and Communications [Member]
Goodwill [Roll Forward]
Goodwill, Beginning Balance	2,200,000
Goodwill, Adjustments to prior year acquisitions	0
Goodwill, Currency translations	0
Goodwill, Ending Balance	$ 2,200,000