COMMITMENTS AND CONTINGENCIES (Details) (USD $)	3 Months Ended	12 Months Ended				3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 30, 2009	Dec. 31, 2011 Dental Practice Acquisition [Member]	Dec. 31, 2011 Dental Practice Acquisition [Member]	Dec. 31, 2009 Dental Practice Acquisition [Member]	Nov. 02, 2011 Dental Practice Acquisition [Member]
COMMITMENTS AND CONTINGENCIES [Abstract]
Minimum term of operating lease		1 year
Maximum term of operating lease		5 years
Rent expense		$ 4,303,217	$ 4,314,063	$ 4,175,073
Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2013		3,527,285
2014		3,064,108
2015		2,304,569
2016		1,503,431
2017		717,095
Thereafter		262,834
Total		11,379,322
Business Acquisition [Line Items]
Number of years until the contingent liability becomes payable		4 years						4 years
Number of trailing months of operating cash flow used to determine contingent liability		12 months						12 months
Fair value of contingent liabilities					280,000				280,000
Nonoperating expense			5,000			5,000	5,000
Nonoperating Income	$ 280,000		$ 550,000			$ 280,000	$ 280,000