Income taxes - components of provision for income taxes from continuing operations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 19,374	$ (1,525)	$ 133,621
State	8,220	1,432	5,213
Non-U.S.	23,690	29,353	35,444
Deferred:
Federal	(2,041)	(5,124)	(258,247)
State	(28,277)	(5,114)	1,459
Non-U.S.	(143,044)	4,174	212,158
Provision for income taxes from continuing operations	$ (122,078)	$ 23,196	$ 129,648