CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common Stock at Par Value	Capital in Excess of Par Value	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
Balance at Dec. 31, 2016	$ 4,463,315	$ 125,424	$ 1,112,114	$ (1,637,476)	$ 5,194,610	$ (383,539)	$ 52,182
Consolidated net income (loss)	407,376	0	0	0	402,176	0	5,200
Other comprehensive income (loss)	263,663	0	0	0	0	258,656	5,007
Amortization of stock-based compensation	39,122	0	39,122	0	0	0	0
Shares issued for stock-based compensation awards	22,195	0	(27,281)	49,476	0	0	0
Purchase of subsidiary shares from non-controlling interest	(23,350)	0	(9,788)	0	0	0	(13,562)
Repurchases of common stock	(174,239)	0	0	(174,239)	0	0	0
Distributions	(142)	0	0	0	0	0	(142)
Balance at Dec. 31, 2017	4,997,940	125,424	1,114,167	(1,762,239)	5,596,786	(124,883)	48,685
Effect of new accounting principles	0	0	0	0	22,354	(22,354)	0
Consolidated net income (loss)	721,574	0	0	0	716,195	0	5,379
Other comprehensive income (loss)	(154,743)	0	0	0	0	(152,212)	(2,531)
Amortization of stock-based compensation	46,238	0	46,238	0	0	0	0
Shares issued for stock-based compensation awards	8,819	0	(24,471)	33,290	0	0	0
Repurchases of common stock	(243,305)	0	0	(243,305)	0	0	0
Distributions	(157)	0	0	0	0	0	(157)
Balance at Dec. 31, 2018	5,376,366	125,424	1,135,934	(1,972,254)	6,335,335	(299,449)	51,376
Consolidated net income (loss)	(200,168)	0	0	0	(204,087)	0	3,919
Other comprehensive income (loss)	36,564	0	0	0	0	37,238	(674)
Amortization of stock-based compensation	41,070	0	41,070	0	0	0	0
Shares issued for stock-based compensation awards	16,911	0	(26,998)	43,909	0	0	0
Repurchases of common stock	(404,203)	0	0	(404,203)	0	0	0
Distributions	(147)	0	0	0	0	0	(147)
Balance at Dec. 31, 2019	$ 4,866,393	$ 125,424	$ 1,150,006	$ (2,332,548)	$ 6,131,248	$ (262,211)	$ 54,474