Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income	$ 240,755	$ 85,066	$ 97,147
Other comprehensive(loss) income, net of tax
Foreign currency translation adjustments	(10,183)	29,294	(7,352)
Reclassification of cumulative translation adjustment associated with liquidated and planned sale of subsidiaries	0	1,702	0
Reclassification adjustment associated with the sale of available-for-sale investments	0	0	(611)
Pension liability adjustments, net of income tax (benefit) expense of $(13), $(26), and $82 for year ended December 31, 2018, 2017, and 2016	59	(232)	462
Other comprehensive (loss) income	(10,124)	30,764	(7,501)
Comprehensive income	$ 230,631	$ 115,830	$ 89,646