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QUARTERLY FINANCIAL DATA (UNAUDITED AND REVISED) - Consolidated Statements of Changes in Stockholders' Equity (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 31, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Jun. 30, 2022 | Sep. 30, 2022 | Dec. 31, 2022
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | $ 330,750 | $ 318,331 | $ 327,271 | $ 303,644 | $ 303,644 | $ 303,644 | $ 303,644
Net income (loss) | (2,922) | 3,469 | 16,294 | 16,488 | 32,782 | 36,251 | 34,343
Stock-based compensation expense | 2,558 |  |  | 124 | 460 | 5,469 | 6,595
Repurchase of shares of common stock | (1,324) |  |  | (10) | (24,669) | (26,486) | (26,543)
Adjustment of redeemable noncontrolling interests to estimated redemption value | (1,308) |  |  | (871) | (1,907) | (3,440) | (5,616)
Exercise of options for common stock |  |  |  |  | 50 | 50 | 50
Other comprehensive income, net of tax |  |  |  | 7,896 | 7,971 | 2,275 | 18,277
BALANCE | 331,577 | 317,763 | 318,331 | 327,271 | 318,331 | 317,763 | 330,750
As Previously Reported |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | 333,772 | 318,651 | 327,312 | 303,680 | 303,680 | 303,680 | 303,680
Net income (loss) |  | 3,407 | 16,573 | 16,493 | 33,066 | 36,473 | 37,329
Stock-based compensation expense |  |  |  | 124 | 460 | 5,469 | 6,595
Repurchase of shares of common stock |  |  |  | (10) | (24,669) | (26,486) | (26,543)
Adjustment of redeemable noncontrolling interests to estimated redemption value |  |  |  | (871) | (1,907) | (3,440) | (5,616)
Exercise of options for common stock |  |  |  |  | 50 | 50 | 50
Other comprehensive income, net of tax |  |  |  | 7,896 | 7,971 | 2,275 | 18,277
BALANCE |  | 318,021 | 318,651 | 327,312 | 318,651 | 318,021 | 333,772
Adjustments and Other Adjustments |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | (3,022) | (320) | (41) | (36) | (36) | (36) | (36)
Net income (loss) |  | 62 | (279) | (5) | (284) | (222) | (2,986)
BALANCE |  | (258) | (320) | (41) | (320) | (258) | (3,022)
Preferred Stock | Convertible Preferred Stock |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | 0 |  | 0 | 0 | 0 | 0 | 0
Net income (loss) | 0 |  |  | 0 |  |  |
Stock-based compensation expense | 0 |  |  | 0 |  |  |
Repurchase of shares of common stock | 0 |  |  | 0 |  |  |
Adjustment of redeemable noncontrolling interests to estimated redemption value | 0 |  |  | 0 |  |  |
Other comprehensive income, net of tax |  |  |  | 0 |  |  |
BALANCE | 0 |  |  | 0 |  |  | 0
Common Stock | Common Stock Class A |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | 10 | 9 | 9 | 9 | 9 | 9 | 9
Net income (loss) | 0 |  |  | 0 |  |  |
Stock-based compensation expense | 0 |  |  | 0 |  | 1 | 1
Repurchase of shares of common stock | 0 |  |  | 0 |  |  |
Adjustment of redeemable noncontrolling interests to estimated redemption value | 0 |  |  | 0 |  |  |
Other comprehensive income, net of tax |  |  |  | 0 |  |  |
BALANCE | 10 | 10 | 9 | 9 | 9 | 10 | 10
Common Stock | Common Stock Class A | As Previously Reported |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | 10 | 9 | 9 | 9 | 9 | 9 | 9
Stock-based compensation expense |  |  |  |  |  | 1 | 1
BALANCE |  | 10 | 9 | 9 | 9 | 10 | 10
Common Stock | Common Stock Class B |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | 3 | 3 | 3 | 3 | 3 | 3 | 3
Net income (loss) | 0 |  |  | 0 |  |  |
Stock-based compensation expense | 0 |  |  | 0 |  |  |
Repurchase of shares of common stock | 0 |  |  | 0 |  |  |
Adjustment of redeemable noncontrolling interests to estimated redemption value | 0 |  |  | 0 |  |  |
Other comprehensive income, net of tax |  |  |  | 0 |  |  |
BALANCE | 3 | 3 | 3 | 3 | 3 | 3 | 3
Common Stock | Common Stock Class B | As Previously Reported |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | 3 | 3 | 3 | 3 | 3 | 3 | 3
BALANCE |  | 3 | 3 | 3 | 3 | 3 | 3
Common Stock | Common Stock Class C |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | 2 | 2 | 2 | 2 | 2 | 2 | 2
Net income (loss) | 0 |  |  | 0 |  |  |
Stock-based compensation expense | 0 |  |  | 0 |  |  |
Repurchase of shares of common stock | 0 |  |  | 0 |  |  |
Adjustment of redeemable noncontrolling interests to estimated redemption value | 0 |  |  | 0 |  |  |
Other comprehensive income, net of tax |  |  |  | 0 |  |  |
BALANCE | 2 | 2 | 2 | 2 | 2 | 2 | 2
Common Stock | Common Stock Class C | As Previously Reported |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | 2 | 2 | 2 | 2 | 2 | 2 | 2
BALANCE |  | 2 | 2 | 2 | 2 | 2 | 2
Common Stock | Common Stock Class D |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | 34 | 33 | 37 | 37 | 37 | 37 | 37
Net income (loss) | 0 |  |  | 0 |  |  |
Stock-based compensation expense | 0 |  |  | 0 |  | 1 | 1
Repurchase of shares of common stock | 0 |  |  | 0 | (4) | (4) | (4)
Adjustment of redeemable noncontrolling interests to estimated redemption value | 0 |  |  | 0 |  |  |
Other comprehensive income, net of tax |  |  |  | 0 |  |  |
BALANCE | 34 | 34 | 33 | 37 | 33 | 34 | 34
Common Stock | Common Stock Class D | As Previously Reported |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | 34 | 33 | 37 | 37 | 37 | 37 | 37
Stock-based compensation expense |  |  |  |  |  | 1 | 1
Repurchase of shares of common stock |  |  |  |  | (4) | (4) | (4)
BALANCE |  | 34 | 33 | 37 | 33 | 34 | 34
Accumulated Other Comprehensive Income |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | 73,227 | 62,921 | 62,846 | 54,950 | 54,950 | 54,950 | 54,950
Other comprehensive income, net of tax |  |  |  | 7,896 | 7,971 | 2,275 | 18,277
BALANCE | 73,227 | 57,225 | 62,921 | 62,846 | 62,921 | 57,225 | 73,227
Accumulated Other Comprehensive Income | As Previously Reported |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | 73,227 | 62,921 | 62,846 | 54,950 | 54,950 | 54,950 | 54,950
Other comprehensive income, net of tax |  |  |  | 7,896 | 7,971 | 2,275 | 18,277
BALANCE |  | 57,225 | 62,921 | 62,846 | 62,921 | 57,225 | 73,227
Additional Paid-In Capital |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | 993,484 | 992,934 | 1,018,239 | 1,018,996 | 1,018,996 | 1,018,996 | 1,018,996
Net income (loss) | 0 |  |  | 0 |  |  |
Stock-based compensation expense | 2,558 |  |  | 124 | 460 | 5,467 | 6,593
Repurchase of shares of common stock | (1,324) |  |  | (10) | (24,665) | (26,482) | (26,539)
Adjustment of redeemable noncontrolling interests to estimated redemption value | (1,308) |  |  | (871) | (1,907) | (3,440) | (5,616)
Exercise of options for common stock |  |  |  |  | 50 | 50 | 50
Other comprehensive income, net of tax |  |  |  | 0 |  |  |
BALANCE | 996,644 | 994,591 | 992,934 | 1,018,239 | 992,934 | 994,591 | 993,484
Additional Paid-In Capital | As Previously Reported |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | 993,484 | 992,934 | 1,018,239 | 1,018,996 | 1,018,996 | 1,018,996 | 1,018,996
Stock-based compensation expense |  |  |  | 124 | 460 | 5,467 | 6,593
Repurchase of shares of common stock |  |  |  | (10) | (24,665) | (26,482) | (26,539)
Adjustment of redeemable noncontrolling interests to estimated redemption value |  |  |  | (871) | (1,907) | (3,440) | (5,616)
Exercise of options for common stock |  |  |  |  | 50 | 50 | 50
BALANCE |  | 994,591 | 992,934 | 1,018,239 | 992,934 | 994,591 | 993,484
Accumulated Deficit |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | (736,010) | (737,571) | (753,865) | (770,353) | (770,353) | (770,353) | (770,353)
Net income (loss) | (2,922) |  |  | 16,488 | 32,782 | 36,251 | 34,343
Stock-based compensation expense | 0 |  |  | 0 |  |  |
Repurchase of shares of common stock | 0 |  |  | 0 |  |  |
Adjustment of redeemable noncontrolling interests to estimated redemption value | 0 |  |  | 0 |  |  |
Other comprehensive income, net of tax |  |  |  | 0 |  |  |
BALANCE | (738,343) | (734,102) | (737,571) | (753,865) | (737,571) | (734,102) | (736,010)
Accumulated Deficit | As Previously Reported |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | (732,988) | (737,251) | (753,824) | (770,317) | (770,317) | (770,317) | (770,317)
Net income (loss) |  |  |  | 16,493 | 33,066 | 36,473 | 37,329
BALANCE |  | (733,844) | (737,251) | (753,824) | (737,251) | (733,844) | (732,988)
Accumulated Deficit | Adjustments and Other Adjustments |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |
BALANCE | $ (3,022) | (320) | (41) | (36) | (36) | (36) | (36)
Net income (loss) |  |  |  | (5) | (284) | (222) | (2,986)
BALANCE |  | $ (258) | $ (320) | $ (41) | $ (320) | $ (258) | $ (3,022)

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