Quarterly report pursuant to Section 13 or 15(d)

Changes in Accumulated Other Comprehensive Loss by Component - Rollforward (Details)

v3.21.1
Changes in Accumulated Other Comprehensive Loss by Component - Rollforward (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Changes to accumulated other comprehensive loss by component    
Balance at the beginning of the period $ (5,495) $ (2,814)
Other comprehensive gain (loss) before reclassifications (213) (4,503)
Amounts reclassified from accumulated other comprehensive loss 719 209
Balance at the end of the period (4,989) (7,108)
Unrealized Net Loss on Interest Rate Swap    
Changes to accumulated other comprehensive loss by component    
Balance at the beginning of the period (7,608) (5,023)
Other comprehensive gain (loss) before reclassifications (213) (4,503)
Amounts reclassified from accumulated other comprehensive loss 777 266
Balance at the end of the period (7,044) (9,260)
Other Postretirement Benefit Liability    
Changes to accumulated other comprehensive loss by component    
Balance at the beginning of the period 2,113 2,209
Amounts reclassified from accumulated other comprehensive loss (58) (57)
Balance at the end of the period $ 2,055 $ 2,152