Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital from Treasury Stock Transactions	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss), net of tax	Redeemable Noncontrolling Interests in Subsidiaries/ Temporary Equity
Balance, beginning of period at Dec. 31, 2022	$ 1,045,692	$ 441,142	$ 0	$ 1,015,589	$ (365,363)	$ (45,676)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	69,601			69,601
Other Comprehensive Income (Loss), net of tax	9,620					9,620
Stock Award Activity	10,677	10,677		(9,950)	9,950
Dividends Declared	(24,145)			(24,145)
Purchase of Treasury Stock	(4,742)				(4,742)
Balance, end of period at Mar. 31, 2023	1,106,703	451,819	0	1,051,095	(360,155)	(36,056)
Balance, beginning of period at Dec. 31, 2022	61,821						$ 61,821
Increase (Decrease) in Temporary Equity [Roll Forward]
Net Income (Loss)	1,865						1,865
Other Comprehensive Income (Loss), net of tax	232						232
Subscriptions—Redeemable Noncontrolling Interest Holders	12,776						12,776
Consolidation (Deconsolidation)	(33,962)						(33,962)
Distributions to Noncontrolling Interest in Subsidiaries	(3,224)						(3,224)
Balance, end of period at Mar. 31, 2023	39,508						39,508
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	72,175			72,175
Other Comprehensive Income (Loss), net of tax	14,477					14,477
Stock Award Activity	8,951	8,970		(39)	20
Dividends Declared	(25,084)			(25,084)
Purchase of Treasury Stock	(43,366)				(43,366)
Balance, end of period at Jun. 30, 2023	1,133,856	460,789	0	1,098,147	(403,501)	(21,579)
Increase (Decrease) in Temporary Equity [Roll Forward]
Net Income (Loss)	827						827
Other Comprehensive Income (Loss), net of tax	328						328
Subscriptions—Redeemable Noncontrolling Interest Holders	19,684						19,684
Consolidation (Deconsolidation)	12,119						12,119
Distributions to Noncontrolling Interest in Subsidiaries	(14,454)						(14,454)
Balance, end of period at Jun. 30, 2023	58,012						58,012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	75,026			75,026
Other Comprehensive Income (Loss), net of tax	(21,814)					(21,814)
Stock Award Activity	7,488	7,473	15
Dividends Declared	(24,687)			(24,687)
Purchase of Treasury Stock	(69,831)				(69,831)
Balance, end of period at Sep. 30, 2023	1,100,038	468,262	15	1,148,486	(473,332)	(43,393)
Increase (Decrease) in Temporary Equity [Roll Forward]
Net Income (Loss)	(760)						(760)
Other Comprehensive Income (Loss), net of tax	(454)						(454)
Subscriptions—Redeemable Noncontrolling Interest Holders	35,323						35,323
Consolidation (Deconsolidation)	(6,601)						(6,601)
Distributions to Noncontrolling Interest in Subsidiaries	(14,889)						(14,889)
Balance, end of period at Sep. 30, 2023	70,631						70,631
Balance, beginning of period at Dec. 31, 2023	1,128,252	475,003	2	1,194,561	(521,403)	(19,911)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	75,033			75,033
Other Comprehensive Income (Loss), net of tax	(5,235)					(5,235)
Stock Award Activity	10,301	10,262	(2)	(10,936)	10,977
Dividends Declared	(23,727)			(23,727)
Purchase of Treasury Stock	(37,197)				(37,197)
Balance, end of period at Mar. 31, 2024	1,147,427	485,265	0	1,234,931	(547,623)	(25,146)
Balance, beginning of period at Dec. 31, 2023	25,845						25,845
Increase (Decrease) in Temporary Equity [Roll Forward]
Net Income (Loss)	(23)						(23)
Other Comprehensive Income (Loss), net of tax	(106)						(106)
Subscriptions—Redeemable Noncontrolling Interest Holders	2,724						2,724
Consolidation (Deconsolidation)	48,100						48,100
Distributions to Noncontrolling Interest in Subsidiaries	(3,410)						(3,410)
Balance, end of period at Mar. 31, 2024	73,130						73,130
Balance, beginning of period at Dec. 31, 2023	1,128,252	475,003	2	1,194,561	(521,403)	(19,911)
Balance, end of period at Sep. 30, 2024	1,083,516	497,530	0	1,207,794	(622,696)	888
Balance, beginning of period at Dec. 31, 2023	25,845						25,845
Balance, end of period at Sep. 30, 2024	53,408						53,408
Balance, beginning of period at Mar. 31, 2024	1,147,427	485,265	0	1,234,931	(547,623)	(25,146)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	21,027			21,027
Other Comprehensive Income (Loss), net of tax	526					526
Stock Award Activity	6,128	6,128		(8)	8
Dividends Declared	(110,106)			(110,106)
Purchase of Treasury Stock	(47,977)				(47,977)
Balance, end of period at Jun. 30, 2024	1,017,025	491,393	0	1,145,844	(595,592)	(24,620)
Balance, beginning of period at Mar. 31, 2024	73,130						73,130
Increase (Decrease) in Temporary Equity [Roll Forward]
Net Income (Loss)	(1,802)						(1,802)
Other Comprehensive Income (Loss), net of tax	13						13
Subscriptions—Redeemable Noncontrolling Interest Holders	16,303						16,303
Consolidation (Deconsolidation)	(52,723)						(52,723)
Distributions to Noncontrolling Interest in Subsidiaries	(4,430)						(4,430)
Balance, end of period at Jun. 30, 2024	30,491						30,491
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	87,538			87,538
Other Comprehensive Income (Loss), net of tax	25,508					25,508
Stock Award Activity	6,137	6,137		(46)	46
Dividends Declared	(25,542)			(25,542)
Purchase of Treasury Stock	(27,150)				(27,150)
Balance, end of period at Sep. 30, 2024	1,083,516	$ 497,530	$ 0	$ 1,207,794	$ (622,696)	$ 888
Increase (Decrease) in Temporary Equity [Roll Forward]
Net Income (Loss)	2,803						2,803
Other Comprehensive Income (Loss), net of tax	554						554
Subscriptions—Redeemable Noncontrolling Interest Holders	13,503						13,503
Consolidation (Deconsolidation)	16,624						16,624
Distributions to Noncontrolling Interest in Subsidiaries	(10,567)						(10,567)
Balance, end of period at Sep. 30, 2024	$ 53,408						$ 53,408