Summary of Significant Accounting Policies - Schedule of Intangible Assets (Details) $ in Thousands	Dec. 31, 2017 USD ($)
Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	$ 736,360
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	623,200
Less: accumulated amortization	(5,540)
Noncompete Agreements
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	124,100
Less: accumulated amortization	$ (5,400)