Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.1
Fair Value Disclosures - Assets and Liabilities Measured at Fair Value (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Interest rate swaps    
Liabilities:    
Interest rate swaps $ (8,700)  
Recurring | SERP    
Assets:    
SERP 2,191 $ 2,433
Recurring | Interest rate swaps    
Liabilities:    
Interest rate swaps (8,674) (10,255)
Recurring | Level 1 | SERP    
Assets:    
SERP 0 0
Recurring | Level 1 | Interest rate swaps    
Liabilities:    
Interest rate swaps 0 0
Recurring | Level 2 | SERP    
Assets:    
SERP 2,191 2,433
Recurring | Level 2 | Interest rate swaps    
Liabilities:    
Interest rate swaps (8,674) (10,255)
Recurring | Level 3 | SERP    
Assets:    
SERP 0 0
Recurring | Level 3 | Interest rate swaps    
Liabilities:    
Interest rate swaps $ 0 $ 0