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NOTES PAYABLE AND AMENDED CREDIT AGREEMENT (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Nov. 30, 2017 | Mar. 31, 2017 | Jan. 31, 2016 | Sep. 30, 2020 | Sep. 30, 2020 | Dec. 05, 2013
Debt Instruments [Abstract] |  |  |  |  |  |
Aggregate principal payment due in 2022 |  |  |  | $ 4,999,000 | $ 4,999,000 |
Notes Payable [Member] |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |
Seller note |  |  |  | $ 300,000 | $ 300,000 |
Percentage of interest accrued |  |  |  | 4.75% | 4.75% |
Aggregate amount of notes payable |  |  |  | $ 4,800,000 | $ 4,800,000 |
Aggregate principal payment due in 2021 |  |  |  | 4,600,000 | 4,600,000 |
Aggregate principal payment due in 2022 |  |  |  | 200,000 | 200,000 |
Notes Payable [Member] | Redeemable Non-Controlling Interest [Member] |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |
Seller note |  |  |  | $ 200,000 | $ 200,000 |
Minimum [Member] |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |
Spread on Libor variable rate |  |  |  | 1.25% | 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 |  |  |  | 3.25% |  |
Maximum [Member] |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |
Spread on Libor variable rate |  |  |  | 2.00% | 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 |  |  |  |  |  | $ 125,000,000.0
Revolving credit facility maturity date |  |  |  |  | Nov. 30, 2021 |
Remaining revolving credit outstanding |  |  |  | $ 118,000,000.0 | $ 118,000,000.0 |
Average effective interest rate |  |  |  |  | 2.50% |
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 |  |  |
Management Contracts [Member] |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |
Seller note |  |  |  | 500,000 | $ 500,000 |
Management Contracts [Member] | Notes Payable [Member] |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |
Seller note |  |  |  | 500,000 | 500,000 |
Management Contracts [Member] | Notes Payable One [Member] |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |
Seller note |  |  |  | $ 200,000 | $ 200,000 |
Percentage of interest accrued |  |  |  | 5.00% | 5.00% |
Management Contracts [Member] | Notes Payable Two [Member] |  |  |  |  |  |
Debt Instruments [Abstract] |  |  |  |  |  |
Seller note |  |  |  | $ 300,000 | $ 300,000 |
Percentage of interest accrued |  |  |  | 5.00% | 5.00% |

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