SEGMENT REPORTING - Financial Information Concerning Company's Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenues	$ 891,621	$ 715,689	$ 1,765,802	$ 1,379,008
Gross Profit	381,095	304,824	750,279	586,155
Amortization	50,909	8,921	69,183	17,718	$ 45,498
EBITA	192,103	178,515	372,455	340,297
Other Segments
Segment Reporting Information [Line Items]
Revenues	66,105	66,670	136,145	124,082
Gross Profit	32,883	32,917	67,787	59,692
Amortization	1,980	1,800	3,959	3,611
EBITA	14,121	13,777	29,674	23,050
Reportable Segments
Segment Reporting Information [Line Items]
EBITA	177,982	164,738	342,781	317,247
Reportable Segments \| Domestic Regulated and Compliance Services
Segment Reporting Information [Line Items]
Revenues	591,037	451,512	1,170,664	866,348
Gross Profit	271,816	208,690	532,975	401,878
Amortization	32,670	3,482	43,086	6,685
EBITA	164,181	140,106	315,880	269,018
Reportable Segments \| International Regulated and Compliance Services
Segment Reporting Information [Line Items]
Revenues	234,479	197,507	458,993	388,578
Gross Profit	76,396	63,217	149,517	124,585
Amortization	16,259	3,639	22,138	7,422
EBITA	$ 13,801	$ 24,632	$ 26,901	$ 48,229

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=66902209&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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