Other Noncurrent Liabilities (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure Other Noncurrent Liabilities [Abstract]

Other Noncurrent Liabilities

Other noncurrent liabilities consist of the following at December 31, 2014 and 2013 (in thousands):

	December 31,
	2014		2013
Liabilities related to uncertain tax positions(a)	$	25,340	$	29,834
Executive deferred compensation plan obligation	22,168		23,030
Deferred revenue—long-term	2,010		2,444
Environmental liabilities(b)	4,841		9,213
Asset retirement obligations(b)	15,085		16,930
Other	18,261		29,159
Total	$	87,705	$	110,610

(a) See Note 19, “Income Taxes.”

(b) See Note 16, “Commitments and Contingencies.”