Quarterly Results of Operations - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Effect Of Fourth Quarter Events [Line Items]
Income (loss), net of income taxes	$ 2,800	$ (15,400)	$ (42,600)	$ 14,200	$ 49,100	$ 17,500	$ 41,200	$ 8,300	$ (41,017)	$ 116,100	$ 15,325
Litigation Settlement Expense
Effect Of Fourth Quarter Events [Line Items]
Income (loss), net of income taxes			$ (49,000)
Kronos | Execution and Finalization of Agreement | Canada-Germany APA
Effect Of Fourth Quarter Events [Line Items]
Income (loss), net of income taxes						2,200
Kronos | Loss on Prepayment of Debt
Effect Of Fourth Quarter Events [Line Items]
Income (loss), net of income taxes						(900)
Kronos | GILTI
Effect Of Fourth Quarter Events [Line Items]
Income (loss), net of income taxes	$ (900)
Non-cash Deferred Income Tax Benefit | Kronos | Valuation Allowance of Deferred Tax Assets | Germany And Belgium
Effect Of Fourth Quarter Events [Line Items]
Income (loss), net of income taxes					3,200			$ 1,000
Non-cash Deferred Income Tax Benefit | Kronos | Expected Future Periods Net Operating Loss Utilization | Valuation Allowance of Deferred Tax Assets | Germany And Belgium
Effect Of Fourth Quarter Events [Line Items]
Income (loss), net of income taxes							$ 31,100
Non-cash Deferred Income Tax Benefit | Kronos | Expected Future Periods Net Operating Loss Utilization | Valuation Allowance of Deferred Tax Assets | One Non US Subsidiary
Effect Of Fourth Quarter Events [Line Items]
Income (loss), net of income taxes					3,700
Non-cash Deferred Income Tax Benefit | Kronos | Current Periods Net Operating Loss Utilization | Valuation Allowance of Deferred Tax Assets | Germany And Belgium
Effect Of Fourth Quarter Events [Line Items]
Income (loss), net of income taxes						$ 1,500
Non-cash Deferred Income Tax Benefit | Deferred Income Tax Liability | U.S. Federal Corporate Income Tax Rate
Effect Of Fourth Quarter Events [Line Items]
Income (loss), net of income taxes					37,500
Transition Tax | Kronos | Non-US
Effect Of Fourth Quarter Events [Line Items]
Income (loss), net of income taxes					(15,100)
Undistributed Earnings | Kronos | European Subsidiaries
Effect Of Fourth Quarter Events [Line Items]
Income (loss), net of income taxes					$ (900)