Goodwill and Other Intangible Assets - Summary of Other Intangible Assets and Related Accumulated Amortization (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Acquisition intangibles, gross	$ 377,086	$ 368,796
Accumulated amortization	(109,827)	(73,418)
Total intangibles, net	267,259	295,378
Customer related intangibles
Finite-Lived Intangible Assets [Line Items]
Acquisition intangibles, gross	186,231	181,671
Accumulated amortization	(51,491)	(38,754)
Acquired software
Finite-Lived Intangible Assets [Line Items]
Acquisition intangibles, gross	176,096	172,666
Accumulated amortization	(55,115)	(32,880)
Trade name
Finite-Lived Intangible Assets [Line Items]
Acquisition intangibles, gross	11,065	10,765
Accumulated amortization	(2,740)	(1,747)
Leases acquired
Finite-Lived Intangible Assets [Line Items]
Acquisition intangibles, gross	3,694	3,694
Accumulated amortization	$ (481)	$ (37)