Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amounts	$ 2,672,369	$ 1,020,117
Accumulated Amortization	(235,002)	(148,854)
Net Carrying Amount	2,437,367	871,263
Trade Names And Trademarks Indefinite Lived [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amounts	337,467	99,690
Net Carrying Amount	337,467	99,690
Customer and Vendor Agreements [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Life (Years)	15 years 1 month 6 days
Gross Carrying Amounts	2,139,339	850,809
Accumulated Amortization	(205,365)	(134,998)
Net Carrying Amount	1,933,974	715,811
Trade Names and Trademarks [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Life (Years)	15 years
Gross Carrying Amounts	3,332	3,341
Accumulated Amortization	(1,847)	(1,635)
Net Carrying Amount	1,485	1,706
Software [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Life (Years)	5 years
Gross Carrying Amounts	174,507	47,778
Accumulated Amortization	(21,511)	(9,090)
Net Carrying Amount	152,996	38,688
Non-compete [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Weighted- Avg Useful Life (Years)	5 years 7 months 6 days
Gross Carrying Amounts	17,724	18,499
Accumulated Amortization	(6,279)	(3,131)
Net Carrying Amount	$ 11,445	$ 15,368