Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Activity in Recorded Environmental Liabilities Activity

We had the following activity in our recorded environmental liabilities for the years ended December 31, 2016, 2015 and 2014 (in thousands):

	Year Ended December 31,
	2016			2015			2014
Balance, beginning of year	$	31,436		$	9,235		$	16,599
Expenditures	(2,667		)	(4,039		)	(4,548		)
Acquisition of Rockwood	—			34,626			—
Divestitures	—			(1,826		)	(1,954		)
Accretion of discount	793			902			—
Additions and revisions of estimates	4,004			150			34
Reclass to liabilities held for sale(a)	—			(5,253		)	—
Foreign currency translation adjustments and other	1,353			(2,359		)	(896		)
Balance, end of year(b)	34,919			31,436			9,235
Less amounts reported in Accrued expenses	2,324			1,443			4,394
Amounts reported in Other noncurrent liabilities	$	32,595		$	29,993		$	4,841

(a) Represents environmental liabilities of the metal sulfides and minerals-based flame retardants and specialty chemicals businesses. See Note 3, “Divestitures,” for additional information.

(b) As of December 31, 2015, $3.9 million of environmental liabilities were classified as Liabilities held for sale in the consolidated balance sheets. See Note 3, “Divestitures,” for additional information.

Schedule of Change in Asset Retirement Obligation

The following is a reconciliation of our beginning and ending asset retirement obligation balances for 2016 and 2015 (in thousands):

	Year Ended December 31,
	2016			2015
Balance, beginning of year	$	37,230		$	15,085
Acquisition of Rockwood	—			17,265
Liabilities incurred	—			3,636
Accretion of discount	1,354			1,289
Liabilities settled	(370		)	—
Foreign currency translation adjustments and other	(1,918		)	(45		)
Balance, end of year	$	36,296		$	37,230

Future Non-Cancelable Minimum Lease Payments for Next Five Years and Thereafter

The following schedule details the future non-cancelable minimum lease payments for the next five years and thereafter (in thousands):

	Operating Leases
2017	$	12,065
2018	$	10,153
2019	$	7,878
2020	$	6,369
2021	$	5,490
Thereafter	$	19,240

Letters of Credit and Guarantee Agreements

The following table summarizes our letters of credit and guarantee agreements (in thousands):

	2017		2018		2019		2020		2021		Thereafter
Letters of credit and other guarantees	$	23,619	$	5,052	$	795	$	199	$	315	$	21,357