CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Consolidated net income (loss)	$ (200,168)	$ 721,574	$ 407,376
Other comprehensive income (loss):
Foreign currency translation adjustment and other, net of taxes	19,948	(163,927)	248,317
Unrealized gain on investment securities, net of taxes	0	0	8,852
Unrealized gain on foreign exchange contracts designated as net investment hedges, net of taxes	10,368	0	0
Unrealized gain (loss) on interest rate swaps designated as cash flow hedges, net of taxes	(7,787)	931	(2,359)
Employee benefit plan items, net of taxes	14,035	8,253	8,853
Other comprehensive income (loss)	36,564	(154,743)	263,663
Comprehensive income (loss)	(163,604)	566,831	671,039
Less: Comprehensive income attributable to noncontrolling interests	3,245	2,848	10,207
Comprehensive income (loss) attributable to shareholders	$ (166,849)	$ 563,983	$ 660,832