NATURE OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 ReportingUnit Customer	Dec. 31, 2012 Customer	Dec. 31, 2011 Customer	Jan. 15, 2013	Dec. 31, 2010	Nov. 30, 2006
Segment Reporting Information [Line Items]
Collections in respect of prior year write-offs amount	$ 0	$ 0	$ 0
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at Beginning of Period	2,203	2,250	1,671
Charged to Costs and Expenses	619	1,244	1,234
Deductions/Other	(1,022)	(1,291)	(655)
Balance at End of Year	1,800	2,203	2,250
Finite lived intangible assets impairment charges	0	0	0
Long-lived assets impairment charges	0	0	0
Cash and cash equivalents	169,207	118,112	88,796		54,004
Number of customers accounted for more than ten percentage of revenue	0	0	1
Subcontractor costs	2,078	3,535	4,545
Basis spread on variable rate (in hundredths)	1.25%			1.25%		1.25%
Stock options vesting term	4 years
Loan term	5 years
Interest rate on loan	7.50%
Employee loans	6,390	429
Employee Loans As A Percentage Of Total Assets	1.50%
Number of reporting units subject to annual impairment testing	3
Loans on nonaccrual status	90 days
Number Of Customers Accounted For More Than Ten Percentage of Accounts Receivable	1
Number of Customers Accounted For More Than Ten Percentage Of Unbilled Revenues	2
Disclosure of Change of Date for Annual Goodwill Impairment Test	Effective in the fourth quarter of 2013, the Company changed the annual goodwill impairment assessment date for all of its reporting units from December 31st to October 31st, which represented a voluntary change in the annual goodwill impairment testing date. The Company is also required to assess the goodwill of its reporting units for impairment between annual assessment dates when events or circumstances dictate. This change does not delay, accelerate or avoid an impairment charge and is preferable as additional resources for the preparation, review, and conclusion of the annual goodwill impairment test are available at this time. Further, this timing more closely aligns with the Company’s annual budgeting and planning process. Information prepared during the annual budgeting and planning process is used extensively in the Company’s impairment assessment. The Company evaluates the recoverability of goodwill at a reporting unit level and it had three reporting units that were subject to the annual impairment testing in 2013. The Company’s annual impairment review as of October 31, 2013 and December 31, 2012 did not result in an impairment charge for any of these reporting units. It was impracticable to apply this change retrospectively, as the Company is unable to objectively determine significant estimates and assumptions that would have been used in those earlier periods without the use of hindsight.
Minimum [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Estimated useful lives of property and equipment	3 years
Maximum [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Estimated useful lives of property and equipment	50 years
Top Five Customers [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Percentage of revenues accounted by major customers (in hundredths)	30.60%	31.00%	32.00%
Revenue amount by major customer	169,987	134,484	107,171
Top Ten Customers [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Percentage of revenues accounted by major customers (in hundredths)	42.30%	44.40%	44.60%
Revenue amount by major customer	234,955	192,426	149,094
Top Two Customers [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Percentage of total unbilled revenues by major customer	33.30%
CIS Countries [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Cash and cash equivalents	103,100
Belarus [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Cash and cash equivalents	73,900
Time And Material Contracts [Member]
Segment Reporting Information [Line Items]
Percentage of revenues (in hundredths)	82.30%	84.10%	86.10%
Fixed Price Contracts [Member]
Segment Reporting Information [Line Items]
Percentage of revenues (in hundredths)	15.70%	13.70%	11.00%
Fixed Price Contracts [Member] | Minimum [Member]
Segment Reporting Information [Line Items]
Warranty period	2 years
Fixed Price Contracts [Member] | Maximum [Member]
Segment Reporting Information [Line Items]
Fixed price contracts period	3 years
Warranty period	3 years
Loans Under Employee Housing Program [Member]
Allowance for Doubtful Accounts Receivable [Roll Forward]
Loan term	5 years
Interest rate on loan	7.50%
Capped price per housing loan	$ 50
Maximum loan-to-value-ratio	70.00%