CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - UNAUDITED - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Total Shareholders' Equity	Total Shareholders' Equity Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interests
Balance at the beginning of year (in shares) at Dec. 31, 2019				140,174,000
Balance, beginning of year at Dec. 31, 2019	$ 1,584,092	$ (1,977)		$ 1,399	$ 165,314	$ (379,873)	$ 1,700,912	$ (1,977)	$ 1,487,752	$ (1,977)	$ 96,340
Increase (Decrease) in Shareholders' Equity
Net earnings (loss)	(251,072)						(271,608)		(271,608)		20,536
OCI	(85,734)					(83,443)			(83,443)		(2,291)
Dividends ($0.10 per share)	(14,120)						(14,120)		(14,120)
Distributions to NCI	(19,288)										(19,288)
Capital contributions by NCI	82,109										82,109
Other NCI transactions	2,389				2,057				2,057		332
Stock-based plan activity (in shares)				(435,000)
Stock-based plan activity	10,285			$ 4	10,246		35		10,285
Balance at the end of year (in shares) at Sep. 30, 2020				140,609,000
Balance, end of year at Sep. 30, 2020	1,306,684			$ 1,403	177,617	(463,316)	1,413,242		1,128,946		177,738
Balance at the beginning of year (in shares) at Jun. 30, 2020				140,565,000
Balance, beginning of year at Jun. 30, 2020	1,230,894			$ 1,403	175,089	(478,636)	1,393,866		1,091,722		139,172
Increase (Decrease) in Shareholders' Equity
Net earnings (loss)	23,640						19,341		19,341		4,299
OCI	14,825					15,320			15,320		(495)
Distributions to NCI	(8,457)										(8,457)
Capital contributions by NCI	42,589										42,589
Other NCI transactions	951				321				321		630
Stock-based plan activity (in shares)				(44,000)
Stock-based plan activity	2,242				2,207		35		2,242
Balance at the end of year (in shares) at Sep. 30, 2020				140,609,000
Balance, end of year at Sep. 30, 2020	1,306,684			$ 1,403	177,617	(463,316)	1,413,242		1,128,946		177,738
Balance at the beginning of year (in shares) at Dec. 31, 2020			0	140,715,000
Balance, beginning of year at Dec. 31, 2020	1,263,227		$ 0	$ 1,404	195,940	(416,906)	1,249,809		1,030,247		232,980
Increase (Decrease) in Shareholders' Equity
Net earnings (loss)	(138,472)						(161,001)		(161,001)		22,529
OCI	(23,154)					(24,913)			(24,913)		1,759
Dividends ($0.10 per share)	(9,425)						(9,425)		(9,425)
Issuance of CPS (in shares)			600,000
Issuance of CPS	582,000		$ 6		581,994				582,000
Distributions to NCI	(20,158)										(20,158)
Capital contributions by NCI	201,511										201,511
Other NCI transactions	(33,021)				159,473				159,473		(192,494)
Stock-based plan activity (in shares)				(697,000)
Stock-based plan activity	21,146			$ 7	21,119		20		21,146
Balance at the end of year (in shares) at Sep. 30, 2021			600,000	141,412,000
Balance, end of year at Sep. 30, 2021	1,843,654		$ 6	$ 1,411	958,526	(441,819)	1,079,403		1,597,527		246,127
Balance at the beginning of year (in shares) at Jun. 30, 2021			600,000	141,416,000
Balance, beginning of year at Jun. 30, 2021	1,771,394		$ 6	$ 1,411	882,450	(416,663)	1,048,345		1,515,549		255,845
Increase (Decrease) in Shareholders' Equity
Net earnings (loss)	37,350						40,469		40,469		(3,119)
OCI	(22,801)					(25,156)			(25,156)		2,355
Dividends ($0.10 per share)	(9,425)						(9,425)		(9,425)
Issuance of CPS (in shares)			0
Issuance of CPS	0		$ 0		0				0
Distributions to NCI	(1,981)										(1,981)
Capital contributions by NCI	95,479										95,479
Other NCI transactions	(30,038)				72,414				72,414		(102,452)
Stock-based plan activity (in shares)				(4,000)
Stock-based plan activity	3,676			$ 0	3,662		14		3,676
Balance at the end of year (in shares) at Sep. 30, 2021			600,000	141,412,000
Balance, end of year at Sep. 30, 2021	$ 1,843,654		$ 6	$ 1,411	$ 958,526	$ (441,819)	$ 1,079,403		$ 1,597,527		$ 246,127