Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
REVENUES:
Services	$ 149,389	$ 148,323	$ 451,098	$ 444,635
Products	70,288	66,508	194,578	189,863
Total revenues	219,677	214,831	645,676	634,498
COST OF REVENUES:
Cost of services	126,452	126,732	378,546	367,939
Cost of products	44,561	43,783	128,851	126,467
Total cost of revenues	171,013	170,515	507,397	494,406
Gross profit	48,664	44,316	138,279	140,092
OPERATING EXPENSES:
Administrative	17,472	11,526	46,850	38,667
Salary and payroll taxes	16,419	18,533	56,762	56,455
Total operating expenses	33,891	30,059	103,612	95,122
Income from operations	14,773	14,257	34,667	44,970
OTHER INCOME (EXPENSE), NET:
Interest expense	(712)	(899)	(2,165)	(3,455)
Other income	202	132	671	435
Total other income (expense), net	(510)	(767)	(1,494)	(3,020)
Income before provision for income taxes	14,263	13,490	33,173	41,950
PROVISION FOR INCOME TAXES	2,157	2,038	5,423	5,466
Net income	$ 12,106	$ 11,452	$ 27,750	$ 36,484
INCOME PER SHARE:
Basic (in Dollars per share)	$ 0.88	$ 0.78	$ 1.94	$ 2.49
Diluted (in Dollars per share)	$ 0.87	$ 0.77	$ 1.93	$ 2.46