Carrying Amount and Accumulated Amortization of Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 349,184	$ 302,654
Accumulated Amortization	(87,748)	(64,961)
Net Balance	261,436us-gaap_FiniteLivedIntangibleAssetsNet	237,693us-gaap_FiniteLivedIntangibleAssetsNet
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	322,216	277,356
Accumulated Amortization	(68,616)	(49,410)
Net Balance	253,600	227,946
Purchased contracts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	10,768	10,865
Accumulated Amortization	(10,768)	(10,865)
Trademarks and tradenames
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,767	13,995
Accumulated Amortization	(7,946)	(4,383)
Net Balance	7,821	9,612
Covenant not to compete
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	433	438
Accumulated Amortization	(418)	(303)
Net Balance	$ 15	$ 135

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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