Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Fair Value Disclosures - Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Supplemental Employee Retirement Plan [Member]    
Assets:    
SERP $ 1,476 $ 1,364
Supplemental Employee Retirement Plan [Member] | Level 1    
Assets:    
SERP 0 0
Supplemental Employee Retirement Plan [Member] | Level 2    
Assets:    
SERP 1,476 1,364
Supplemental Employee Retirement Plan [Member] | Level 3    
Assets:    
SERP 0 0
Interest Rate Swap    
Assets:    
Interest rate swaps 7,587 10,638
Liabilities:    
Interest rate swaps (1,917) (799)
Interest Rate Swap | Level 1    
Assets:    
Interest rate swaps 0 0
Liabilities:    
Interest rate swaps 0 0
Interest Rate Swap | Level 2    
Assets:    
Interest rate swaps 7,587 10,638
Liabilities:    
Interest rate swaps (1,917) (799)
Interest Rate Swap | Level 3    
Assets:    
Interest rate swaps 0 0
Liabilities:    
Interest rate swaps $ 0 $ 0