Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
REVENUES:
Services	$ 119,255	$ 108,076	$ 344,999	$ 304,973
Products	60,101	53,068	170,748	153,138
Total revenues	179,356	161,144	515,747	458,111
COST OF REVENUES:
Cost of services	97,965	88,210	280,930	249,218
Cost of products	41,432	36,932	118,876	103,251
Total cost of revenues	139,397	125,142	399,806	352,469
Gross profit	39,959	36,002	115,941	105,642
OPERATING EXPENSES:
Administrative	12,171	7,922	28,600	26,778
Salary and payroll taxes	14,142	13,184	42,605	39,747
Total operating expenses	26,313	21,106	71,205	66,525
Income from operations	13,646	14,896	44,736	39,117
OTHER INCOME (EXPENSE), NET:
Interest expense	(253)	(959)	(1,578)	(2,650)
Other income	60	28	277	135
Total other income (expense), net	(193)	(931)	(1,301)	(2,515)
Income before provision for income taxes	13,453	13,965	43,435	36,602
PROVISION FOR INCOME TAXES	1,681	2,214	4,810	5,234
Net income	$ 11,772	$ 11,751	$ 38,625	$ 31,368
Income per share:
Basic (in Dollars per share)	$ 0.79	$ 0.79	$ 2.58	$ 2.12
Diluted (in Dollars per share)	$ 0.77	$ 0.78	$ 2.54	$ 2.08