Software and Other Intangible Assets - Carrying Amount and Accumulated Amortization of Other Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 332,223	$ 364,805
Accumulated Amortization	(105,938)	(107,880)
Net Balance	226,285	256,925
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	304,913	336,075
Accumulated Amortization	(85,170)	(86,585)
Net Balance	219,743	249,490
Trademarks and tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,664	18,040
Accumulated Amortization	(10,122)	(10,605)
Net Balance	6,542	7,435
Purchased contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10,646	10,690
Accumulated Amortization	$ (10,646)	$ (10,690)