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Additional Balance Sheet Information
 9 Months Ended
Sep. 30, 2021
Balance Sheet Related Disclosures [Abstract]  
Additional Balance Sheet Information Additional Balance Sheet Information
Certain balance sheet amounts are comprised of the following:
(In thousands)September 30,
2021		December 31,
2020
Accounts receivable, net  
Trade accounts $285,367 $215,301 
Other accounts 381 462 
 285,748 215,763 
Allowance for doubtful accounts (1,039)(1,039)
 $284,709 $214,724 
Other assets  
Deferred compensation plan $25,737 $22,510 
Debt issuance costs5,329 6,875 
Operating lease right-of-use assets30,961 33,741 
Other accounts33 85 
 $62,060 $63,211 
Accounts payable  
Trade accounts $24,124 $12,896 
Royalty and other owners 45,900 37,243 
Accrued transportation53,800 52,238 
Accrued capital costs 39,771 37,872 
Taxes other than income 16,401 13,736 
Other accounts47,196 8,096 
 $227,192 $162,081 
Accrued liabilities  
Employee benefits $12,762 $14,270 
Taxes other than income 3,330 3,026 
Operating lease liabilities3,814 3,991 
Other accounts 1,135 1,087 
 $21,041 $22,374 
Other liabilities  
Deferred compensation plan $36,525 $30,581 
Derivative instruments1,237 — 
Operating lease liabilities 27,035 29,628 
Other accounts12,731 21,069 
 $77,528 $81,278