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NOTES PAYABLE AND AMENDED CREDIT AGREEMENT (Details) - USD ($)	1 Months Ended			3 Months Ended
	Nov. 30, 2017	Mar. 31, 2017	Jan. 31, 2016	Mar. 31, 2020	Dec. 05, 2013
Debt Instruments [Abstract]
Aggregate principal payment due in 2021				$ 728,000
Notes Payable [Member]
Debt Instruments [Abstract]
Seller note				$ 300,000
Percentage of interest accrued				4.75%
Aggregate amount of notes payable				$ 4,600,000
Aggregate principal payment due in 2020				200,000
Aggregate principal payment due in 2021				$ 4,300,000
Minimum [Member]
Debt Instruments [Abstract]
Spread on Libor variable rate				1.25%
Spread on variable rate				0.10%
Percentage of unused commitment fee				0.25%
Minimum [Member] | Notes Payable [Member]
Debt Instruments [Abstract]
Average effective interest rate				4.75%
Maximum [Member]
Debt Instruments [Abstract]
Spread on Libor variable rate				2.00%
Spread on variable rate				1.00%
Percentage of unused commitment fee				0.30%
Maximum [Member] | Notes Payable [Member]
Debt Instruments [Abstract]
Average effective interest rate				5.50%
Credit Facility [Member]
Debt Instruments [Abstract]
Revolving credit facility commitment				$ 125,000,000	$ 125,000,000.0
Revolving credit facility maturity date				Nov. 30, 2021
Remaining revolving credit outstanding				$ 11,000,000.0
Average effective interest rate				2.40%
Credit Agreement [Member]
Debt Instruments [Abstract]
Cash and noncash consideration with respect to acquisition after amendment			$ 50,000,000.0
Credit Agreement [Member] | Maximum [Member]
Debt Instruments [Abstract]
Cash dividends after amendment	$ 20,000,000.0	$ 15,000,000.0	$ 10,000,000.0

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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