COMMITMENTS AND CONTINGENCIES (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Leases [Abstract]
Rent expense		$ 5,283,481	$ 4,851,547	$ 4,730,324
Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2017	$ 4,082,000	4,082,000
2018	3,489,000	3,489,000
2019	2,990,000	2,990,000
2020	2,006,000	2,006,000
2021	1,237,000	1,237,000
Thereafter	2,122,000	2,122,000
Total	15,926,000	$ 15,926,000
Business Acquisition [Line Items]
Number of years until the contingent liability becomes payable		4 years
Number of trailing months of operating cash flow used to determine contingent liability		12 months
Fair value adjustment of contingent liabilities	(100,000)	$ 0	$ (100,000)	$ 0
Fair value of contingent liabilities	$ 321,000	$ 321,000
Minimum [Member]
Operating Leases [Abstract]
Term of operating lease		1 year
Maximum [Member]
Operating Leases [Abstract]
Term of operating lease		15 years
Dental Practice Acquisition [Member]
Business Acquisition [Line Items]
Number of years until the contingent liability becomes payable		4 years
Number of trailing months of operating cash flow used to determine contingent liability		12 months