OTHER COMPREHENSIVE INCOME (Tables)	9 Months Ended
	Sep. 30, 2021
OTHER COMPREHENSIVE INCOME [Abstract]
Accumulated Other Comprehensive Income, Net of Tax	September 30 December 31 September 30in thousands2021 2020 2020AOCI Interest rate hedges$       (22,863) $       (23,943) $       (24,294) Pension and postretirement plans (153,657) (157,362) (181,701) Total$     (176,520) $     (181,305) $     (205,995)
Changes in Accumulated Other Comprehensive Income, Net of Tax	Pension and Interest Rate Postretirement in thousandsHedges Benefit Plans TotalAOCI Balances as of December 31, 2020$       (23,943) $     (157,362) $     (181,305) Amounts reclassified from AOCI 1,080  3,705  4,785  Net current period OCI changes 1,080  3,705  4,785  Balances as of September 30, 2021$       (22,863) $     (153,657) $     (176,520)
Amounts Reclassified from Accumulated Other Comprehensive Income to Earnings	Three Months Ended Nine Months Ended September 30 September 30in thousands2021 2020 2021 2020 Amortization of Interest Rate Hedge Losses Interest expense$            493  $            473  $         1,461  $         1,810  Benefit from income taxes (129) (123) (381) (472) Total$            364  $            350  $         1,080  $         1,338  Amortization of Pension and Postretirement Plan Actuarial Loss and Prior Service Cost Other nonoperating expense$         1,671  $         2,294  $         5,014  $         6,881  Benefit from income taxes (436) (599) (1,309) (1,796) Total$         1,235  $         1,695  $         3,705  $         5,085  Total reclassifications from AOCI to earnings$         1,599  $         2,045  $         4,785  $         6,423