Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.1
Fair Value Disclosures - Assets and Liabilities Measured at Fair Value (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Interest Rate Swap    
Liabilities:    
Interest rate swaps $ (32,700)  
Recurring | SERP    
Assets:    
SERP 1,561 $ 1,792
Recurring | Interest Rate Swap    
Assets:    
Interest rate swaps 0 5,549
Liabilities:    
Interest rate swaps (32,744) (3,726)
Recurring | Level 1 | SERP    
Assets:    
SERP 0 0
Recurring | Level 1 | Interest Rate Swap    
Assets:    
Interest rate swaps 0 0
Liabilities:    
Interest rate swaps 0 0
Recurring | Level 2 | SERP    
Assets:    
SERP 1,561 1,792
Recurring | Level 2 | Interest Rate Swap    
Assets:    
Interest rate swaps 0 5,549
Liabilities:    
Interest rate swaps (32,744) (3,726)
Recurring | Level 3 | SERP    
Assets:    
SERP 0 0
Recurring | Level 3 | Interest Rate Swap    
Assets:    
Interest rate swaps 0 0
Liabilities:    
Interest rate swaps $ 0 $ 0