SEGMENT REPORTING - Financial Information Concerning Company's Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenues	$ 917,733	$ 891,621	$ 1,810,132	$ 1,765,802
Gross Profit	381,752	377,641	750,414	744,221
Intangible amortization	29,481	50,909	58,570	69,183	$ 129,300
Adjusted EBITA	183,100	192,103	353,470	372,455
Domestic and Canada RCS
Segment Reporting Information [Line Items]
Revenues	649,106	630,652	1,282,839	1,246,783
Gross Profit	284,910	285,473	563,013	559,388
Intangible amortization	21,890	36,405	43,590	47,722
Adjusted EBITA	197,417	192,198	383,866	377,050
International Regulated and Compliance Services
Segment Reporting Information [Line Items]
Revenues	180,061	194,865	361,641	382,874
Gross Profit	56,498	60,898	114,990	121,631
Intangible amortization	5,585	12,525	10,929	17,502
Adjusted EBITA	18,356	16,715	38,401	35,646
All Other Segments
Segment Reporting Information [Line Items]
Revenues	88,566	66,104	165,652	136,145
Gross Profit	40,344	31,270	72,411	63,202
Intangible amortization	2,006	1,979	4,051	3,959
Adjusted EBITA	$ (32,673)	$ (16,810)	$ (68,797)	$ (40,241)

Adjusted earnings before interest, taxes, and amortization (EBITA).

No definition available.

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1,2)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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