CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock Issued	Common Stock Treasury	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Beginning balance at Dec. 31, 2021	$ 805,770	$ 144,883	$ (846,622)	$ 215,528	$ 1,794,510	$ (560,139)	$ 57,610
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(38,680)				(39,839)		1,159
Total other comprehensive income	12,008					12,490	(482)
Vesting of restricted stock units and other stock grants, net	(1,632)	378	(1,632)	(378)
Amortization of unearned portion of stock-based compensation, net of forfeitures	3,629			3,629
Ending balance at Mar. 31, 2022	781,095	145,261	(848,254)	218,779	1,754,671	(547,649)	58,287
Beginning balance at Dec. 31, 2021	805,770	144,883	(846,622)	215,528	1,794,510	(560,139)	57,610
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(143,176)
Total other comprehensive income	(17,118)
Ending balance at Jun. 30, 2022	651,703	145,319	(848,320)	221,117	1,649,080	(573,872)	58,379
Beginning balance at Mar. 31, 2022	781,095	145,261	(848,254)	218,779	1,754,671	(547,649)	58,287
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(104,496)				(105,591)		1,095
Total other comprehensive income	(29,126)					(26,223)	(2,903)
Amortization of unearned portion of stock-based compensation, net of forfeitures	2,396			2,396
Contributions from noncontrolling interests	1,900						1,900
Stock appreciation rights exercised, net	(66)	29	(66)	(29)
Vesting of performance share units, net	0	29	0	(29)
Ending balance at Jun. 30, 2022	651,703	145,319	(848,320)	221,117	1,649,080	(573,872)	58,379
Beginning balance at Dec. 31, 2022	623,042	145,448	(848,570)	225,759	1,614,441	(567,636)	53,600
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(8,590)				(9,525)		935
Total other comprehensive income	7,152					6,794	358
Sale of subsidiary shares to noncontrolling interest				398			(398)
Vesting of restricted stock units and other stock grants, net	(1,108)	395	(1,108)	(395)
Amortization of unearned portion of stock-based compensation, net of forfeitures	3,456			3,456
Ending balance at Mar. 31, 2023	623,952	145,843	(849,678)	229,218	1,604,916	(560,842)	54,495
Beginning balance at Dec. 31, 2022	623,042	145,448	(848,570)	225,759	1,614,441	(567,636)	53,600
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(24,428)
Total other comprehensive income	21,553
Ending balance at Jun. 30, 2023	627,407	145,966	(849,808)	232,463	1,593,477	(544,606)	49,915
Beginning balance at Mar. 31, 2023	623,952	145,843	(849,678)	229,218	1,604,916	(560,842)	54,495
Increase (Decrease) in Stockholders' Equity
Net income (loss)	(15,838)				(11,439)		(4,399)
Total other comprehensive income	14,401					16,236	(1,835)
Vesting of restricted stock units and other stock grants, net	(130)	123	(130)	(123)
Amortization of unearned portion of stock-based compensation, net of forfeitures	3,368			3,368
Contributions from noncontrolling interests	1,654						1,654
Ending balance at Jun. 30, 2023	$ 627,407	$ 145,966	$ (849,808)	$ 232,463	$ 1,593,477	$ (544,606)	$ 49,915