XML 73 R64.htm IDEA: XBRL DOCUMENT v3.20.2
Components of Accumulated Other Comprehensive Loss (Changes in Accumulated Other Comprehensive Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Accumulated Other Comprehensive Income Loss [Line Items]        
Balance at beginning of period $ (1,149,614) $ (1,278,386) $ (1,226,831) $ (1,314,779)
Effect of pension settlement     (31,811)  
Balance at end of period (1,125,476) (1,246,050) (1,125,476) (1,246,050)
Pension Plans [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Balance at beginning of period 101,524 126,678 117,028 129,253
Net loss arising during the period     19,402  
Effect of pension settlement     (31,811)  
Amounts reclassified from AOCL to earnings (2,654) (2,497) (5,749) (5,072)
Balance at end of period 98,870 124,181 98,870 124,181
Other Post Retirement Benefit Plans [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Balance at beginning of period 10,257 27 10,331 (1,382)
Amounts reclassified from AOCL to earnings (73) 1,489 (147) 2,898
Balance at end of period 10,184 1,516 10,184 1,516
Cash Flow Hedges [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Balance at beginning of period 58,525 10,073 20,000 1,560
Net loss arising during the period 3,669 10,598 43,032 19,192
Amounts reclassified from AOCL to earnings (1,822) (181) (2,660) (262)
Balance at end of period 60,372 20,490 60,372 20,490
Accumulated Other Comprehensive Loss [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Balance at beginning of period 170,306 136,778 147,359 129,431
Balance at end of period $ 169,426 $ 146,187 $ 169,426 $ 146,187