LEASES (Tables)	9 Months Ended
	Sep. 30, 2021
LEASES [Abstract]
Schedule of Lease Assets and Liabilities, Weighted-Average Lease Term and Discount Rate	September 30 December 31 September 30 dollars in thousandsClassification on the Balance Sheet2021 2020 2020 Assets Operating lease ROU assets $     728,763  $     482,513  $     483,659  Accumulated amortization (71,882) (59,385) (52,432) Operating leases, netOperating lease right-of-use assets, net 656,881  423,128  431,227  Finance lease assets 125,624  7,796  7,003  Accumulated amortization (4,975) (1,640) (1,148) Finance leases, netProperty, plant & equipment, net 120,649  6,156  5,855  Total lease assets $     777,530  $     429,284  $     437,082  Liabilities Current OperatingOther current liabilities$       48,727  $       36,969  $       36,434  FinanceOther current liabilities 38,395  2,047  1,875  Noncurrent Operating Noncurrent operating lease liabilities 622,275  399,582  407,336  FinanceOther noncurrent liabilities 63,172  4,139  4,000  Total lease liabilities $     772,569  $     442,737  $     449,645  Lease Term and Discount Rate Weighted-average remaining lease term (years) Operating leases 21.0  9.5  10.1  Finance leases 3.4  4.2  4.2  Weighted-average discount rate Operating leases3.9% 3.6% 3.9% Finance leases1.2% 1.4% 1.5%
Components of Lease Expense	Three Months Ended Nine Months Ended September 30 September 30in thousands2021 2020 2021 2020 Lease Cost Finance lease cost Amortization of right-of-use assets$           828  $           449  $        2,158  $        1,122  Interest on lease liabilities 172  27  231  75  Operating lease cost 18,390  14,837  49,199  43,177  Short-term lease cost 1 7,717  7,787  17,878  24,507  Variable lease cost 2,225  3,236  7,696  10,141  Sublease income (668) (677) (2,325) (2,133) Total lease cost$      28,664  $      25,659  $      74,837  $      76,889  1Our short-term lease cost includes the cost of leases with an initial term of one month or less.