Other Noncurrent Liabilities

12 Months Ended

Dec. 31, 2017

Other Liabilities, Noncurrent [Abstract]

Other Noncurrent Liabilities

Other Noncurrent Liabilities:

Other noncurrent liabilities consist of the following at December 31, 2017 and 2016 (in thousands):

	December 31,
	2017		2016
Transition tax on foreign earnings(a)	$	394,878	$	—
Liabilities related to uncertain tax positions(b)	24,369		27,919
Executive deferred compensation plan obligation	25,494		22,037
Environmental liabilities(c)	37,518		32,595
Asset retirement obligations(c)	40,450		36,296
Tax indemnification liability(d)	42,707		38,255
Other(e)	33,758		37,708
Total(f)	$	599,174	$	194,810

(a) Noncurrent portion of one-time transition tax on foreign earnings. See Note 20, “Income Taxes,” for additional information.

(b) See Note 20, “Income Taxes.”

(c) See Note 17, “Commitments and Contingencies.”

(d) Indemnification of certain income and non-income tax liabilities associated with the Chemetall Surface Treatment entities sold.

(e) No individual component exceeds 5% of total liabilities.

(f) As of December 31, 2017, $0.6 million of Other noncurrent liabilities were classified as Liabilities held for sale in the consolidated balance sheets. See Note 3, “Divestitures,” for additional information.