Commitments and Contingencies - Activity in Recorded Environmental Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Accrual for Environmental Loss Contingencies [Roll Forward]
Balance, beginning of year		$ 16,599		$ 20,322		$ 12,359
Expenditures		(4,548)		(3,013)		(1,451)
Divestitures		(1,954)		0		0
Changes in estimates recorded to earnings and other		34		(902)		227
Exit of phosphorus flame retardants business	8,700	0		0		8,700
Foreign currency translation		(896)		192		487
Balance, end of year		9,235		16,599		20,322
Less amounts reported in Accrued expenses		4,394		7,386		3,109
Amounts reported in Other noncurrent liabilities		$ 4,841	[1]	$ 9,213	[1]	$ 17,213

[1] See Note 16, “Commitments and Contingencies.”