GOODWILL AND INTANGIBLE ASSETS - NET (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Line Items]
Goodwill, net - beginning balance		$ 22,698	$ 8,169
Effect of net foreign currency exchange rate changes		(430)	235
Goodwill, net - ending balance		22,268	22,698	8,169
Goodwill impairment loss	1,697	0	0	1,697
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount		20,512	20,977
Accumulated amortization		(6,778)	(4,143)
Net carrying amount		13,734	16,834
Amortization of intangible assets		2,785	1,024	779
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2014		2,503
2015		2,376
2016		2,341
2017		1,865
2018		977
Thereafter		3,672
Client Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average life at acquisition		9 years	9 years
Gross carrying amount		13,432	13,724
Accumulated amortization		(4,885)	(3,640)
Net carrying amount		8,547	10,084
Amortization of intangible assets		1,373	627	720
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average life at acquisition		5 years	5 years
Gross carrying amount		6,232	6,372
Accumulated amortization		(1,643)	(439)
Net carrying amount		4,589	5,933
Amortization of intangible assets		1,222	333	59
Non-competition Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average life at acquisition		5 years	5 years
Gross carrying amount		848	881
Accumulated amortization		(250)	(64)
Net carrying amount		598	817
Amortization of intangible assets		190	64	0
Thoughtcorp Inc [Member]
Goodwill [Line Items]
Acquisition of Goodwill			2,935
Empathy Lab LLC [Member]
Goodwill [Line Items]
Acquisition of Goodwill			11,359
North America [Member]
Goodwill [Line Items]
Goodwill, net - beginning balance		16,643	2,286
Effect of net foreign currency exchange rate changes		(205)	63
Goodwill, net - ending balance		16,438	16,643
Goodwill, Impaired, Accumulated Impairment Loss		0	0	0
North America [Member] | Thoughtcorp Inc [Member]
Goodwill [Line Items]
Acquisition of Goodwill			2,935
North America [Member] | Empathy Lab LLC [Member]
Goodwill [Line Items]
Acquisition of Goodwill			11,359
EU [Member]
Goodwill [Line Items]
Goodwill, net - beginning balance		2,864	2,864
Effect of net foreign currency exchange rate changes		0	0
Goodwill, net - ending balance		2,864	2,864
Goodwill, Impaired, Accumulated Impairment Loss		0	0	0
EU [Member] | Thoughtcorp Inc [Member]
Goodwill [Line Items]
Acquisition of Goodwill			0
EU [Member] | Empathy Lab LLC [Member]
Goodwill [Line Items]
Acquisition of Goodwill			0
Russia [Member]
Goodwill [Line Items]
Goodwill, net - beginning balance		3,191	3,019
Effect of net foreign currency exchange rate changes		(225)	172
Goodwill, net - ending balance		2,966	3,191
Goodwill, Impaired, Accumulated Impairment Loss		0	0	0
Russia [Member] | Thoughtcorp Inc [Member]
Goodwill [Line Items]
Acquisition of Goodwill			0
Russia [Member] | Empathy Lab LLC [Member]
Goodwill [Line Items]
Acquisition of Goodwill			0
Other [Member]
Goodwill [Line Items]
Goodwill, net - beginning balance		0	0
Effect of net foreign currency exchange rate changes		0	0
Goodwill, net - ending balance		0	0
Goodwill, Impaired, Accumulated Impairment Loss		(1,697)	(1,697)	(1,697)
Other [Member] | Thoughtcorp Inc [Member]
Goodwill [Line Items]
Acquisition of Goodwill			0
Other [Member] | Empathy Lab LLC [Member]
Goodwill [Line Items]
Acquisition of Goodwill			$ 0