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ACQUISITIONS OF NON-CONTROLLING INTERESTS (Details)	9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($) Installment Partnership	Sep. 30, 2014 USD ($) Partnership	Dec. 31, 2014 USD ($) Partnership
Business Acquisition [Line Items]
Number of separate transactions to purchase partnership interest | Partnership		4	4
Number of partnership in which interest acquired | Partnership	8	2
Number of partnerships in which interest was acquired and classified as redeemable non-controlling interest | Partnership	1
Purchase price for additional non controlling interest	$ 4,000,000	$ 4,900,000	$ 600,000
Acquisitions of noncontrolling interests	2,802,000	4,998,000
Notes payable	$ 1,240,000	0
Number of installments | Installment	2
Accrued interest rate	3.25%
Book value of purchase price	$ 250,000	3,000,000	100,000
Remaining purchase price	3,800,000	1,900,000	500,000
Future tax benefits	$ 1,500,000	$ 800,000	$ 200,000
Minimum [Member]
Business Acquisition [Line Items]
Percentage of interest acquired	5.00%	10.00%	1.00%
Maximum [Member]
Business Acquisition [Line Items]
Percentage of interest acquired	35.00%	35.00%	35.00%

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Represents the purchase by the parent of an additional equity interest in a subsidiary during the period, thereby effecting a change in total (consolidated) equity attributable to the parent. The purchase of the additional equity interest represented by this element increases the parent's controlling interest in the subsidiary.

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Contractual interest rate for funds borrowed, under the debt agreement.

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The cash outflow associated with the purchase of noncontrolling interest during the period.

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Number of partnership in which interest acquired during the period.

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