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NOTES PAYABLE AND AMENDED CREDIT AGREEMENT, Credit Facilities (Details) - USD ($) | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2022 | Dec. 31, 2021 | Dec. 05, 2013
Debt Instruments [Abstract] |  |  |
Aggregate amount of notes payable | $ 155,696,000 | $ 118,417,000 |
Notes Payable [Member] |  |  |
Debt Instruments [Abstract] |  |  |
Aggregate amount of notes payable | 4,900,000 |  |
Aggregate principal payment due in 2022 | 800,000 |  |
Aggregate principal payment due in 2023 | $ 4,100,000 |  |
Notes Payable [Member] | Minimum [Member] |  |  |
Debt Instruments [Abstract] |  |  |
Average effective interest rate | 3.25% |  |
Notes Payable [Member] | Maximum [Member] |  |  |
Debt Instruments [Abstract] |  |  |
Average effective interest rate | 3.50% |  |
Term Facility [Member] |  |  |
Debt Instruments [Abstract] |  |  |
Revolving credit facility commitment | $ 150,000,000 |  |
Frequency of term facility | quarterly |  |
Interest rate on credit facility in first two years | 0.625% |  |
Interest rate on credit facility in third and fourth year | 1.25% |  |
Interest rate on credit facility in fifth year | 1.875% |  |
Aggregate amount of notes payable | $ 150,000,000 | 0 |
Revolving Facility [Member] |  |  |
Debt Instruments [Abstract] |  |  |
Revolving credit facility commitment | $ 175,000,000 |  | $ 125,000,000.0
Term of credit facility | 5 years |  |
Aggregate amount of notes payable | $ 0 | $ 114,000,000 |
Revolving Facility [Member] | Minimum [Member] |  |  |
Debt Instruments [Abstract] |  |  |
Percentage of unused commitment fee | 0.25% |  |
Revolving Facility [Member] | Maximum [Member] |  |  |
Debt Instruments [Abstract] |  |  |
Increase on limit of credit facility | $ 50,000,000 |  |
Percentage of unused commitment fee | 0.35% |  |
Standby Letters of Credit [Member] |  |  |
Debt Instruments [Abstract] |  |  |
Revolving credit facility commitment | $ 12,000,000 |  |
Swingline Loans [Member] |  |  |
Debt Instruments [Abstract] |  |  |
Revolving credit facility commitment | $ 15,000,000 |  |
Swingline Loans [Member] | SOFR [Member] | Minimum [Member] |  |  |
Debt Instruments [Abstract] |  |  |
Applicable margin for SOFR borrowings rate | 1.50% |  |
Swingline Loans [Member] | SOFR [Member] | Maximum [Member] |  |  |
Debt Instruments [Abstract] |  |  |
Applicable margin for SOFR borrowings rate | 2.25% |  |
Swingline Loans [Member] | Alternate Base Rate [Member] | Minimum [Member] |  |  |
Debt Instruments [Abstract] |  |  |
Spread on variable rate | 0.50% |  |
Swingline Loans [Member] | Alternate Base Rate [Member] | Maximum [Member] |  |  |
Debt Instruments [Abstract] |  |  |
Spread on variable rate | 1.25% |  |
Senior Credit Facility [Member] |  |  |
Debt Instruments [Abstract] |  |  |
Debt instrument, maturity date | Jun. 17, 2027 |  |
Aggregate principal amount | $ 325,000,000 |  |
Increase on limit of credit facility | $ 100,000,000 |  |
Leverage ratio | 2.0 |  |
Outstanding amount | $ 150,000,000.0 |  |
Remaining revolving credit outstanding | $ 175,000,000.0 |  |

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