QUARTERLY FINANCIAL DATA (UNAUDITED AND RESTATED) - Consolidated Statements of Changes in Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended							6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2022	Dec. 31, 2021
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	$ 318,651	$ 327,312	$ 303,680	$ 296,960	$ 281,803	$ 241,700	$ 231,223	$ 303,680	$ 231,223	$ 303,680	$ 231,223	$ 303,680	$ 231,223
Net income	3,407	16,573	16,493	5,286	13,885	17,613	7	33,066	17,620	36,473	31,505	37,329	36,791
Stock-based compensation expense			124				253	460	425	5,469	478	6,595	565
Issuance of shares of Class A common stock							12,125		33,282		33,277		33,277
Repurchase of shares of common stock			(10)				(872)	(24,669)	(905)	(26,486)	(944)	(26,543)	(970)
Exercise of options for common stock								50	315	50	366	50	397
Other comprehensive income, net of tax	(5,696)	75	7,896	1,399	3,312	3,392	(908)	7,971	2,484	2,275	5,796	18,277	7,195
Adjustment of redeemable noncontrolling interests to estimated redemption value			(871)				(128)	(1,907)	(2,641)	(3,440)	(4,741)	(5,616)	(4,798)
BALANCE	318,021	318,651	327,312	303,680	296,960	281,803	241,700	318,651	281,803	318,021	296,960	333,772	303,680
Preferred Stock | Convertible Preferred Stock
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE			0				0	0	0	0	0	0	0
Net income												0	0
Stock-based compensation expense												0	0
Issuance of shares of Class A common stock													0
Repurchase of shares of common stock												0	0
Exercise of options for common stock												0	0
Other comprehensive income, net of tax												0	0
Adjustment of redeemable noncontrolling interests to estimated redemption value												0	0
BALANCE				0								0	0
Common Stock | Common Stock Class A
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	9	9	9	8	8	6	4	9	4	9	4	9	4
Net income												0	0
Stock-based compensation expense										1		1	0
Issuance of shares of Class A common stock							2		4		4		4
Repurchase of shares of common stock												0	0
Exercise of options for common stock												0	0
Other comprehensive income, net of tax												0	0
Adjustment of redeemable noncontrolling interests to estimated redemption value												0	0
BALANCE	10	9	9	9	8	8	6	9	8	10	8	10	9
Common Stock | Common Stock Class B
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	3	3	3	3	3	3	3	3	3	3	3	3	3
Net income												0	0
Stock-based compensation expense												0	0
Issuance of shares of Class A common stock													0
Repurchase of shares of common stock												0	0
Exercise of options for common stock												0	0
Other comprehensive income, net of tax												0	0
Adjustment of redeemable noncontrolling interests to estimated redemption value												0	0
BALANCE	3	3	3	3	3	3	3	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	3	3	3	3	2	3	2	3	2	3
Net income												0	0
Stock-based compensation expense												0	0
Issuance of shares of Class A common stock													0
Repurchase of shares of common stock												0	0
Exercise of options for common stock												0	0
Other comprehensive income, net of tax												0	0
Adjustment of redeemable noncontrolling interests to estimated redemption value												0	0
BALANCE	2	2	2	2	3	3	3	2	3	2	3	2	2
Common Stock | Common Stock Class D
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	33	37	37	37	37	37	38	37	38	37	38	37	38
Net income												0	0
Stock-based compensation expense										1		1	0
Issuance of shares of Class A common stock													0
Repurchase of shares of common stock							(1)	(4)	(1)	(4)	(1)	(4)	(1)
Exercise of options for common stock												0	0
Other comprehensive income, net of tax												0	0
Adjustment of redeemable noncontrolling interests to estimated redemption value												0	0
BALANCE	34	33	37	37	37	37	37	33	37	34	37	34	37
Accumulated Other Comprehensive Income
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	62,921	62,846	54,950	53,551	50,239	46,847	47,755	54,950	47,755	54,950	47,755	54,950	47,755
Other comprehensive income, net of tax			7,896				(908)	7,971	2,484	2,275	5,796	18,277	7,195
BALANCE	57,225	62,921	62,846	54,950	53,551	50,239	46,847	62,921	50,239	57,225	53,551	73,227	54,950
Additional Paid-In Capital
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	992,934	1,018,239	1,018,996	1,018,961	1,021,001	1,001,905	990,528	1,018,996	990,528	1,018,996	990,528	1,018,996	990,528
Net income												0	0
Stock-based compensation expense			124				253	460	425	5,467	478	6,593	565
Issuance of shares of Class A common stock							12,123		33,278		33,273		33,273
Repurchase of shares of common stock			(10)				(871)	(24,665)	(904)	(26,482)	(943)	(26,539)	(969)
Exercise of options for common stock								50	315	50	366	50	397
Other comprehensive income, net of tax												0	0
Adjustment of redeemable noncontrolling interests to estimated redemption value			(871)				(128)	(1,907)	(2,641)	(3,440)	(4,741)	(5,616)	(4,798)
BALANCE	994,591	992,934	1,018,239	1,018,996	1,018,961	1,021,001	1,001,905	992,934	1,021,001	994,591	1,018,961	993,484	1,018,996
Accumulated Deficit
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	(737,251)	(753,824)	(770,317)	(775,603)	(789,488)	(807,101)	(807,108)	(770,317)	(807,108)	(770,317)	(807,108)	(770,317)	(807,108)
Net income			16,493				7	33,066	17,620	36,473	31,505	37,329	36,791
Stock-based compensation expense												0	0
Issuance of shares of Class A common stock													0
Repurchase of shares of common stock												0	0
Exercise of options for common stock												0	0
Other comprehensive income, net of tax												0	0
Adjustment of redeemable noncontrolling interests to estimated redemption value												0	0
BALANCE	(733,844)	(737,251)	(753,824)	(770,317)	(775,603)	(789,488)	(807,101)	(737,251)	(789,488)	(733,844)	(775,603)	(732,988)	(770,317)
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	259,561	270,564	254,120	248,153	236,463	198,831	186,898	254,120	186,898	254,120	186,898	254,120	186,898
Net income	4,213	15,034	16,369	6,603	13,876	17,866	7	31,403	17,873	35,616	31,749		38,352
Stock-based compensation expense			124				253	460	425	5,469	478		565
Issuance of shares of Class A common stock							12,125		33,282		33,277		33,277
Repurchase of shares of common stock			(10)				(872)	(24,669)	(905)	(26,486)	(944)		(970)
Exercise of options for common stock								50	315	50	366		397
Adjustment of redeemable noncontrolling interests to estimated redemption value			(39)				420	(1,803)	(1,425)	(2,717)	(3,671)		(4,399)
BALANCE	266,052	259,561	270,564	254,120	248,153	236,463	198,831	259,561	236,463	266,052	248,153		254,120
As Previously Reported | Common Stock | Common Stock Class A
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	9	9	9	8	8	6	4	9	4	9	4	9	4
Stock-based compensation expense										1
Issuance of shares of Class A common stock							2		4		4		4
BALANCE	10	9	9	9	8	8	6	9	8	10	8		9
As Previously Reported | Common Stock | Common Stock Class B
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	3	3	3	3	3	3	3	3	3	3	3	3	3
BALANCE	3	3	3	3	3	3	3	3	3	3	3		3
As Previously Reported | Common Stock | Common Stock Class C
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	2	2	2	3	3	3	3	2	3	2	3	2	3
BALANCE	2	2	2	2	3	3	3	2	3	2	3		2
As Previously Reported | Common Stock | Common Stock Class D
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	33	37	37	37	37	37	38	37	38	37	38	37	38
Stock-based compensation expense										1
Repurchase of shares of common stock							(1)	(4)	(1)	(4)	(1)		(1)
BALANCE	34	33	37	37	37	37	37	33	37	34	37		37
As Previously Reported | Additional Paid-In Capital
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	994,678	1,020,711	1,020,636	1,021,272	1,023,458	1,003,694	991,769	1,020,636	991,769	1,020,636	991,769	1,020,636	991,769
Stock-based compensation expense			124				253	460	425	5,467	478		565
Issuance of shares of Class A common stock							12,123		33,278		33,273		33,273
Repurchase of shares of common stock			(10)				(871)	(24,665)	(904)	(26,482)	(943)		(969)
Exercise of options for common stock								50	315	50	366		397
Adjustment of redeemable noncontrolling interests to estimated redemption value			(39)				420	(1,803)	(1,425)	(2,717)	(3,671)		(4,399)
BALANCE	996,954	994,678	1,020,711	1,020,636	1,021,272	1,023,458	1,003,694	994,678	1,023,458	996,954	1,021,272		1,020,636
As Previously Reported | Accumulated Deficit
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	(735,164)	(750,198)	(766,567)	(773,170)	(787,046)	(804,912)	(804,919)	(766,567)	(804,919)	(766,567)	(804,919)	(766,567)	(804,919)
Net income			16,369				7	31,403	17,873	35,616	31,749		38,352
BALANCE	(730,951)	(735,164)	(750,198)	(766,567)	(773,170)	(787,046)	(804,912)	(735,164)	(787,046)	(730,951)	(773,170)		(766,567)
Adjustments and Other Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	59,090	56,748	49,560	48,807	45,340	42,869	44,325	49,560	44,325	49,560	44,325	49,560	44,325
Net income			124					1,663	(253)	857	(244)		(1,561)
Other comprehensive income, net of tax			7,896				(908)	7,971	2,484	2,275	5,796		7,195
Adjustment of redeemable noncontrolling interests to estimated redemption value			(832)				(548)	(104)	(1,216)	(723)	(1,070)		(399)
BALANCE	51,969	59,090	56,748	49,560	48,807	45,340	42,869	59,090	45,340	51,969	48,807		49,560
Adjustments and Other Adjustments | Accumulated Other Comprehensive Income
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	62,921	62,846	54,950	53,551	50,239	46,847	47,755	54,950	47,755	54,950	47,755	54,950	47,755
Other comprehensive income, net of tax			7,896				(908)	7,971	2,484	2,275	5,796		7,195
BALANCE	57,225	62,921	62,846	54,950	53,551	50,239	46,847	62,921	50,239	57,225	53,551		54,950
Adjustments and Other Adjustments | Additional Paid-In Capital
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	(1,744)	(2,472)	(1,640)	(2,311)	(2,457)	(1,789)	(1,241)	(1,640)	(1,241)	(1,640)	(1,241)	(1,640)	(1,241)
Adjustment of redeemable noncontrolling interests to estimated redemption value			(832)				(548)	(104)	(1,216)	(723)	(1,070)		(399)
BALANCE	(2,363)	(1,744)	(2,472)	(1,640)	(2,311)	(2,457)	(1,789)	(1,744)	(2,457)	(2,363)	(2,311)		(1,640)
Adjustments and Other Adjustments | Accumulated Deficit
Error Corrections and Prior Period Adjustments Restatement [Line Items]
BALANCE	(2,087)	(3,626)	(3,750)	(2,433)	(2,442)	(2,189)	(2,189)	(3,750)	(2,189)	(3,750)	(2,189)	$ (3,750)	(2,189)
Net income			124					1,663	(253)	857	(244)		(1,561)
BALANCE	$ (2,893)	$ (2,087)	$ (3,626)	$ (3,750)	$ (2,433)	$ (2,442)	$ (2,189)	$ (2,087)	$ (2,442)	$ (2,893)	$ (2,433)		$ (3,750)