Acquisition, Transaction-Related and Integration Expenses (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	May 04, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Class of Stock [Line Items]
Acquisition, transaction-related and integration expenses		$ 2,231	$ 2,271	$ 30,374	$ 2,353
Profit Participation Units		0	0	158,757	0
Transaction-related bonus		0	0	27,742	0
Total		$ 2,231	$ 2,271	$ 216,873	$ 2,353
Common Class A | PPU Holders Distribution
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)	6,886,140
Accelerated vesting of profit participation units, fair value	$ 126,000
Accelerated vesting cash payment	$ 32,800