Quarterly report pursuant to Section 13 or 15(d)

Fair Value Disclosures - Assets and Liabilities Measured at Fair Value (Details)

v3.21.2
Fair Value Disclosures - Assets and Liabilities Measured at Fair Value (Details) - Recurring - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
SERP    
Assets:    
SERP $ 2,386 $ 2,433
Interest rate swaps    
Liabilities:    
Interest rate derivatives (7,671) (10,255)
Level 1 | SERP    
Assets:    
SERP 0 0
Level 1 | Interest rate swaps    
Liabilities:    
Interest rate derivatives 0 0
Level 2 | SERP    
Assets:    
SERP 2,386 2,433
Level 2 | Interest rate swaps    
Liabilities:    
Interest rate derivatives (7,671) (10,255)
Level 3 | SERP    
Assets:    
SERP 0 0
Level 3 | Interest rate swaps    
Liabilities:    
Interest rate derivatives $ 0 $ 0