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STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE - Additional Information (Details) $ / shares in Units, $ in Millions |  | 3 Months Ended | 9 Months Ended
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May 05, 2022 USD ($) | Sep. 30, 2023 USD ($) class $ / shares shares | Jun. 30, 2023 shares | Mar. 31, 2023 shares | Sep. 30, 2022 shares | Jun. 30, 2022 shares | Sep. 30, 2023 USD ($) class vote $ / shares shares | Sep. 30, 2022 shares
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |
Number of shares excluded from calculation of earnings per share (in shares) |  | 0 |  |  | 0 |  | 0 | 0
Number of classes of stock | class |  | 2 |  |  |  |  | 2 |
Stock repurchase program, authorized amount | $ | $ 20.0 |  |  |  |  |  |  |
Stock repurchase program, period in force | 24 months |  |  |  |  |  |  |
Average cost per share (in dollars per share) | $ / shares |  | $ 11.74 |  |  |  |  | $ 11.20 |
Stock repurchase program, remaining authorized repurchase | $ |  | $ 12.3 |  |  |  |  | $ 12.3 |
Restricted Stock Units |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |
Right to receive common stock, upon vesting (in shares) |  |  |  |  |  |  | 1 |
Class A Common Stock |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |
Common stock, voting rights, votes per share | vote |  |  |  |  |  |  | 1 |
Class A Common Stock | Common​ Stock |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |
Stock repurchased and retired during period (in shares) |  | 87,087 | 51,588 | 50,166 | 138,962 | 141,952 | 188,841 |
Class B Common Stock |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |
Common stock, voting rights, votes per share | vote |  |  |  |  |  |  | 10 |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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