INCOME TAXES (Detail) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Jun. 30, 2006
Income Before Income Tax Expense [Abstract]
Domestic									$ 7,001,000	$ 9,291,000	$ 2,872,000
Foreign									69,769,000	56,572,000	49,920,000
Total	23,312,000	20,356,000	17,435,000	15,667,000	19,040,000	16,587,000	15,896,000	14,340,000	76,770,000	65,863,000	52,792,000
Current
Federal									6,150,000	6,881,000	4,878,000
State									310,000	319,000	389,000
Foreign									8,275,000	7,969,000	2,483,000
Deferred
Federal									(668,000)	(625,000)	(1,629,000)
State									14,000	24,000	(72,000)
Foreign									695,000	(3,189,000)	2,390,000
Total									14,776,000	11,379,000	8,439,000
Deferred Tax Assets:
Fixed assets	732,000				703,000				732,000	703,000
Intangible assets	4,532,000				4,737,000				4,532,000	4,737,000
Accrued expenses	3,488,000				4,042,000				3,488,000	4,042,000
Deferred revenue	2,050,000				1,583,000				2,050,000	1,583,000
Stock-based compensation	407,000				413,000				407,000	413,000
Valuation allowance	0				(489,000)				0	(489,000)
Restricted stock options	1,336,000				1,616,000				1,336,000	1,616,000
Other assets	680,000				1,214,000				680,000	1,214,000
Deferred tax assets	13,225,000				13,819,000				13,225,000	13,819,000
Deferred Tax Liabilities:
Fixed assets	804,000				742,000				804,000	742,000
Accrued revenue and expenses	846,000				737,000				846,000	737,000
Deferred intercompany gain	405,000				405,000				405,000	405,000
Equity compensation	1,593,000				2,431,000				1,593,000	2,431,000
Other liabilities	254,000				0				254,000	0
Deferred tax liability	3,902,000				4,315,000				3,902,000	4,315,000
Net deferred tax asset	9,323,000				9,504,000				9,323,000	9,504,000
Deferred tax assets, current	5,392,000				6,593,000				5,392,000	6,593,000
Deferred tax assets, non current	4,557,000				6,093,000				4,557,000	6,093,000
Deferred tax liabilities, current	275,000				491,000				275,000	491,000
Deferred tax liabilities, non current	351,000				2,691,000				351,000	2,691,000
Undistributed earnings that intended to permanently reinvest	249,600								249,600
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Statutory federal tax									26,102,000	22,393,000	18,482,000
Increase/ (decrease) in taxes resulting from:
State taxes, net of federal benefit									368,000	280,000	266,000
Provision adjustment for current year uncertain tax position									0	0	178,000
Effect of permanent differences									2,524,000	2,177,000	2,816,000
Stock-based compensation									1,948,000	1,165,000	0
Rate differential between U.S. and foreign									(17,279,000)	(14,472,000)	(13,297,000)
Change in foreign tax rate									(59,000)	148,000	(22,000)
Change in valuation allowance									489,000	(489,000)	0
Other									683,000	177,000	16,000
Income tax expense	4,553,000	3,919,000	3,317,000	2,987,000	4,041,000	2,522,000	2,575,000	2,241,000	14,776,000	11,379,000	8,439,000
Income tax rate exempted (in hundredths)															100.00%
Effective income tax rate (in hundredths)															15.00%
Percentage of tax credit form annual Qualified salaries (in hundredths)											10.00%
Income tax credit (in hundredths)									70.00%	70.00%	70.00%	70.00%	70.00%	70.00%
Benefits from tax holidays									9,700,000	8,500,000	21,000,000
Benefits from tax holidays per share (in dollars per share)									$ 0.20	$ 0.19	$ 0.49
Gross unrecognized tax benefits	1,271,000				1,271,000				1,271,000	1,271,000	1,271,000	56,000
Unrecognized tax benefits, accrued penalties and interest	189,000				125,000				189,000	125,000	55,000
Unrecognized tax benefits that, if recognized, would favorably affect the effective tax rate	1,328,000				1,354,000				1,328,000	1,354,000
Unrecognized Tax Benefits [Roll Forward]
Gross Balance at beginning of year				1,271,000				1,271,000	1,271,000	1,271,000	56,000
Increases in tax positions in current year									0	0	178,000
Increases in tax positions in prior year									0	0	1,093,000
Decreases due to settlement									0	0	(56,000)
Balance at end of year	$ 1,271,000				$ 1,271,000				$ 1,271,000	$ 1,271,000	$ 1,271,000	$ 56,000
Belarus [Member]
Increase/ (decrease) in taxes resulting from:
Tax exemption period															15 years
Hungary [Member]
Increase/ (decrease) in taxes resulting from:
Tax exemption period											4 years
Unrecognized Tax Benefits [Roll Forward]
Tax credit limitations on use											The Hungarian tax authorities repealed the tax credit beginning with 2012. Credits earned in years prior to 2012, will be allowed until fully utilized. The Company anticipates full utilization up to the 70% limit until 2014, with full phase out in 2015.