Other Noncurrent Liabilities (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure Other Noncurrent Liabilities [Abstract]

Other Noncurrent Liabilities

Other noncurrent liabilities consist of the following at December 31, 2013 and 2012 (in thousands):

	December 31,
	2013		2012
Liabilities related to uncertain tax positions(a)	$	29,834	$	29,179
Executive deferred compensation plan obligation	23,030		20,265
Deferred revenue—long-term	2,444		3,362
Environmental liabilities(b)	9,213		17,213
Asset retirement obligations(b)	16,930		16,517
Other	29,159		27,486
Total	$	110,610	$	114,022

(a) See Note 18, “Income Taxes.”

(b) See Note 15, “Commitments and Contingencies.”