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FINANCIAL INSTRUMENTS (Tables)
 12 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
Summary of Carrying Amounts and Estimated Fair Values of Other Financial Instruments The following table summarizes the carrying amounts and estimated fair values of our other significant financial instruments at December 31:
 20212020
 Carrying
Amount		Fair
Value		Carrying
Amount		Fair
Value
 (Dollars in thousands)
Assets:
Cash and cash equivalents$631,439 $631,439 $409,481 $409,481 
Liabilities:
Bank debt$1,038,862 $1,038,862 $930,407 $930,407 
4¾% Notes300,000 301,890 300,000 304,890 
3¼% Notes739,180 744,133 795,307 806,283 
4⅛% Notes599,200 612,780 599,089 623,280 
2¼% Notes568,600 565,984 611,775 622,481 
1.4% Notes499,771 487,800 — —