ACQUISITIONS AND DIVESTITURES - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended																		3 Months Ended		6 Months Ended	3 Months Ended													3 Months Ended	6 Months Ended									0 Months Ended
	Jun. 30, 2014 Entity	Mar. 31, 2014 Entity	Jun. 30, 2014 Entity	Jun. 30, 2013	Jun. 30, 2014 Customer relationships Minimum	Jun. 30, 2014 Customer relationships Maximum	Jun. 30, 2014 Tradenames Minimum	Jun. 30, 2014 Tradenames Maximum	Jun. 30, 2014 Technology Minimum	Jun. 30, 2014 Technology Maximum	Jun. 30, 2014 United States Entity	Jun. 30, 2014 Brazil Entity	Jun. 30, 2014 Canada Entity	Jun. 30, 2014 Chile Entity	Jun. 30, 2014 Portugal Entity	Jun. 30, 2014 Romania Entity	Jun. 30, 2014 South Korea Entity	Jun. 30, 2014 Spain Entity	Jun. 30, 2014 United Kingdom Entity	Jun. 30, 2014 United States	Mar. 31, 2014 United States Regulated and Compliance Solutions [Member] Entity	Mar. 31, 2014 United States Communication Solutions [Member] Entity	Jun. 30, 2014 International	Jun. 30, 2014 International Regulated and Compliance Solutions [Member] Brazil Entity	Jun. 30, 2014 International Regulated and Compliance Solutions [Member] Portugal Entity	Mar. 31, 2014 International Regulated and Compliance Solutions [Member] Portugal Entity	Jun. 30, 2014 International Regulated and Compliance Solutions [Member] South Korea Entity	Jun. 30, 2014 International Regulated and Compliance Solutions [Member] Spain Entity	Jun. 30, 2014 International Regulated and Compliance Solutions [Member] United Kingdom Entity	Jun. 30, 2014 International Communication Solutions [Member] Canada Entity	Jun. 30, 2014 Acquisition One [Member] United States Regulated and Compliance Solutions [Member] Entity	Jun. 30, 2014 Acquisition One [Member] International Regulated and Compliance Solutions [Member] Chile Entity	Jun. 30, 2014 Acquisition One [Member] International Regulated and Compliance Solutions [Member] Romania Entity	Jun. 30, 2014 Acquisition Two [Member] United States Regulated and Compliance Solutions [Member] Entity	Jun. 30, 2014 Acquisition Two [Member] International Regulated and Compliance Solutions [Member] Chile	Jun. 30, 2014 Acquisition Two [Member] International Regulated and Compliance Solutions [Member] Romania	Jun. 30, 2014 Acquisition Three [Member] United States Communication Solutions [Member] Entity	Jun. 30, 2014 Acquisitions Year 2014 [Member]	Jun. 30, 2014 Acquisitions Year 2014 [Member] Operating permits	Jun. 30, 2014 Acquisitions Year 2014 [Member] Customer relationships	Jun. 30, 2014 Acquisitions Year 2014 [Member] Customer relationships Minimum	Jun. 30, 2014 Acquisitions Year 2014 [Member] Customer relationships Maximum	Jun. 30, 2014 Acquisitions Year 2014 [Member] Tradenames	Jun. 30, 2014 Acquisitions Year 2014 [Member] Tradenames Maximum	Jun. 30, 2014 Acquisitions Year 2014 [Member] Technology	Jun. 30, 2014 Acquisitions Year 2014 [Member] Technology Maximum	Apr. 22, 2014 PSC Environmental Services, LLC
Significant Acquisitions and Disposals [Line Items]
Number of acquisitions	14	5	19								6	1	1	2	4	2	1	1	1		1	1		1	1	3	1	1	1	1	1	1	1	2			1
Business acquisition, ownership percentage acquired																									100.00%	100.00%	75.50%			100.00%	100.00%	100.00%			90.00%	100.00%
Net increase in Goodwill			$ 178,400,000																	$ 166,500,000			$ 11,900,000
Tax deductible Goodwill amount	75,200,000		75,200,000
Net increase in Intangible Assets																																						219,900,000	119,400,000	81,100,000			100,000		19,400,000
Finite-lived intangible assets, useful life					10 years	40 years	10 years	40 years	5 years	7 years																															15 years	40 years		15 years		7 years
Acquisition related expenses			7,200,000	4,100,000
Total consideration			388,696,000	86,307,000																																											284,000,000
Consideration, cash paid			304,832,000	63,401,000																																											248,200,000
Consideration, note issued			63,022,000	13,725,000																																											30,000,000
Contingent consideration			15,810,000	3,378,000																																											5,800,000
Note term																																															2 years
Liabilities assumed																																															30,000,000
Pro forma revenues from the aggregate acquisitions																																						146,800,000
Impact to revenues of acquisitions																																						$ 54,400,000