Acquisitions and Divestitures - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 2,278,066	$ 2,128,776
Inenco Group
Business Acquisition [Line Items]
Trade accounts receivable	127,823
Merchandise inventories	281,764
Prepaid expenses and other current assets	11,066
Intangible assets	318,301
Deferred tax assets	1,046
Property and equipment	60,313
Operating lease assets	96,845
Other assets	40,840
Total identifiable assets acquired	937,998
Current liabilities	101,564
Long-term debt	150,879
Operating lease liabilities	96,371
Deferred tax liabilities	58,903
Other long-term liabilities	97,407
Total liabilities assumed	505,124
Net identifiable assets acquired	432,874
Goodwill	332,979
Net assets acquired	$ 765,853