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Income Taxes Reconciliation of Total Gross Liability Related to Uncertain Tax Positions (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Beginning Balance | $ 24,969 | $ 29,143 | $ 28,398
Acquisition of Rockwood | 124,758 | 0 | 0
Additions for tax positions related to prior years | 4,329 | 0 | 0
Reductions for tax positions related to prior years | (46,211) | (214) | (348)
Additions for tax positions related to current year | 202 | 2,232 | 2,061
Lapses in statutes of limitations/settlements | (6,736) | (5,057) | (473)
Foreign currency translation adjustment | (5,596) | (1,135) | (495)
Ending Balance | $ 95,715 | $ 24,969 | $ 29,143

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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 + Details
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