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Other Long-term Liabilities
 12 Months Ended
Dec. 31, 2019
Other Liabilities Disclosure [Abstract]  
Other Long-Term Liabilities OTHER LONG-TERM LIABILITIES

Other long-term liabilities consist of the following:
 
 
At December 31,
 
 
2019
 
2018
In thousands
 
 
 
 
Supplemental employees' retirement plan ("SERP")
 
$
6,808

 
$
6,384

Deferred compensation
 
20,768

 
17,885

Long-term incentive plan
 
10,527

 
9,821

Noncurrent income taxes payable
 
3,390

 
3,371

Environmental remediation liability
 
5,525

 
4,610

Finance leases
 
5,559

 
6,261

Other
 
3,838

 
3,543

Total other long-term liabilities(1)
 
$
56,415

 
$
51,875


(1) Other long-term liabilities attributable to the Company's formerly owned Distribution business were included in liabilities held for sale, noncurrent portion as of December 31, 2018 on the Company's Consolidated Balance Sheets. See Note 3, Discontinued Operations, for further information on the Company's sale of the Distribution business.

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.

Disclosures regarding the assumptions used in the determination of the SERP liabilities are included in Note 17, Pension Plans. Discussions of our environmental remediation liabilities are in Note 13, Environmental Costs, and Note 19, Commitments and Contingencies.