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NOTES PAYABLE AND AMENDED CREDIT AGREEMENT (Details) - USD ($)	1 Months Ended	9 Months Ended	12 Months Ended
	Jan. 31, 2016	Sep. 30, 2016	Dec. 31, 2015	Dec. 05, 2013
Debt Instrument [Line Items]
Aggregate principal payment due in 2017		$ 1,470,000
Aggregate principal payment due in 2018		$ 39,076,000
Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Aggregate amount of notes payable			$ 4,900,000
Aggregate principal payment due in 2016			575,000
Aggregate principal payment due in 2017			525,000
Aggregate principal payment due in 2018			1,900,000
Aggregate principal payment due in 2019			$ 1,900,000
Notes Payable [Member]
Debt Instrument [Line Items]
Average effective interest rate		3.50%
Aggregate amount of notes payable		$ 1,000,000
Aggregate principal payment due in 2017		444,000
Aggregate principal payment due in 2018		$ 570,000
Minimum [Member]
Debt Instrument [Line Items]
Percentage of unused commitment fee		0.10%
Minimum [Member] | Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Average effective interest rate			3.25%
Minimum [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Spread on variable rate		1.50%
Minimum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Spread on variable rate		0.10%
Maximum [Member]
Debt Instrument [Line Items]
Percentage of unused commitment fee		0.25%
Maximum [Member] | Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Average effective interest rate			3.50%
Maximum [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Spread on variable rate		2.50%
Maximum [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Spread on variable rate		1.00%
Credit Facility [Member]
Debt Instrument [Line Items]
Average effective interest rate		2.50%
Revolving credit facility commitment				$ 125,000,000
Revolving credit facility maturity date		Nov. 30, 2018
Remaining revolving credit outstanding		$ 89,000,000
Credit Agreement [Member]
Debt Instrument [Line Items]
Cash and noncash consideration with respect to acquisition after amendment	$ 50,000,000
Credit Agreement [Member] | Maximum [Member]
Debt Instrument [Line Items]
Cash dividends after amendment	$ 10,000,000

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