ACQUISITIONS Acquisition and Integration Costs (Details) (All current acquirees, Other Acquisition and Integration Expenses, USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
All current acquirees | Other Acquisition and Integration Expenses
Business Combination, Separately Recognized Transactions [Line Items]
Legal, financial advisory and professional fees	$ 1,571	$ 1,946	$ 2,546	$ 2,956
Employee costs including redundant salaries and benefits and severance	430	342	1,580	1,477
Facilities consolidation and discontinuation	353	864	658	1,023
Change in revenue reserves related to acquired accounts receivable	2,118	0	5,420	0
Legal settlement	8	0	333	2,300
Other	853	360	1,295	379
Total	$ 5,333	$ 3,512	$ 11,832	$ 8,135