Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
REVENUES:
Services	$ 151,312	$ 141,442
Products	60,702	57,091
Total revenues	212,014	198,533
COST OF REVENUES:
Cost of services	121,114	112,278
Cost of products	40,677	40,613
Total cost of revenues	161,791	152,891
Gross profit	50,223	45,642
OPERATING EXPENSES:
Administrative	14,812	10,779
Salary and payroll taxes	19,637	17,135
Total operating expenses	34,449	27,914
Income from operations	15,774	17,728
OTHER INCOME (EXPENSE), NET:
Interest expense	(1,419)	(1,587)
Other income	144	246
Total other income (expense), net	(1,275)	(1,341)
Income before provision for income taxes	14,499	16,387
PROVISION FOR INCOME TAXES	1,759	1,817
Net income	$ 12,740	$ 14,570
INCOME PER SHARE:
Basic (in Dollars per share)	$ 0.87	$ 0.96
Diluted (in Dollars per share)	$ 0.86	$ 0.95