ACCRUED EXPENSES (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Accrued expenses [Abstract]
Sales commissions	$ 1,224	$ 1,295
Subcontracting labor	1,960	2,408
Salaries, bonuses and related benefits	8,163	6,023
Litigation reserve	11,549	11,549
Consideration payable on acquisitions	7,199	0	47
Other	4,342	4,085
Accrued expenses	$ 34,437	$ 25,360