Goodwill and Other Intangible Assets - Summary of Allocation of Acquisition Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Acquired Finite Lived Intangible Assets [Line Items]
Amortizable intangibles, Gross carrying amount	$ 377,086	$ 368,796
Amortizable intangibles, Accumulated Amortization	109,827	73,418
Goodwill	650,237	653,666	$ 124,142
Customer related intangibles
Acquired Finite Lived Intangible Assets [Line Items]
Amortizable intangibles, Gross carrying amount	$ 186,231	$ 181,671
Amortizable intangibles, Weighted Average Amortization Period	15 years	15 years
Amortizable intangibles, Accumulated Amortization	$ 51,491	$ 38,754
Acquired software
Acquired Finite Lived Intangible Assets [Line Items]
Amortizable intangibles, Gross carrying amount	$ 176,096	$ 172,666
Amortizable intangibles, Weighted Average Amortization Period	7 years	7 years
Amortizable intangibles, Accumulated Amortization	$ 55,115	$ 32,880
Trade name
Acquired Finite Lived Intangible Assets [Line Items]
Amortizable intangibles, Gross carrying amount	$ 11,065	$ 10,765
Amortizable intangibles, Weighted Average Amortization Period	12 years	12 years
Amortizable intangibles, Accumulated Amortization	$ 2,740	$ 1,747
Leases acquired
Acquired Finite Lived Intangible Assets [Line Items]
Amortizable intangibles, Gross carrying amount	$ 3,694	$ 3,694
Amortizable intangibles, Weighted Average Amortization Period	9 years	9 years
Amortizable intangibles, Accumulated Amortization	$ 481	$ 37