Other Long-term Liabilities

12 Months Ended

Dec. 31, 2015

Other Liabilities Disclosure [Abstract]

Other Long-Term Liabilities

OTHER LONG-TERM LIABILITIES

Other long-term liabilities consist of the following:

	At December 31,
	2015		2014
In thousands
Supplemental employees' retirement plan ("SERP")	$	9,654	$	9,818
Deferred compensation	16,244		14,601
Long-term incentive plan	7,973		7,527
Noncurrent income taxes payable	2,672		2,300
Environmental remediation liability	9,307		7,370
Other	5,577		4,031
Total	$	51,427	$	45,647

Disclosures regarding the assumptions used in the determination of the SERP liabilities are included in Note 14, Pension Plans. Discussions of our environmental remediation liabilities are in Note 10, Environmental Costs, and Note 16, Commitments and Contingencies.

The Company maintains a non-qualified deferred compensation plan for certain of its employees as well as a non-qualified deferred compensation plan for its Board of Directors. Generally, participants in these plans have the ability to defer a certain amount of their compensation, as defined in the agreement. The deferred compensation liability will be paid out either upon retirement or as requested based upon certain terms in the agreements and in accordance with Internal Revenue Code Section 409A.