Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Assets and Liabilities, Measured on Recurring Basis (Details)

v3.21.2
Fair Value Measurements - Assets and Liabilities, Measured on Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Assets:    
Marketable securities in deferred compensation plan $ 2,662 $ 3,027
Fair value measurement on a recurring basis    
Assets:    
Other marketable securities 33  
Interest rate derivatives 46  
Total assets 2,741  
Liabilities:    
Deferred compensation plan liability 2,662  
Interest rate derivatives 6,646  
Total liabilities 9,308  
Fair value measurement on a recurring basis | Mutual funds    
Assets:    
Marketable securities in deferred compensation plan 2,648  
Fair value measurement on a recurring basis | Other    
Assets:    
Marketable securities in deferred compensation plan 14  
Fair value measurement on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Assets:    
Other marketable securities 33  
Interest rate derivatives 0  
Total assets 2,695  
Liabilities:    
Deferred compensation plan liability 0  
Interest rate derivatives 0  
Total liabilities 0  
Fair value measurement on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mutual funds    
Assets:    
Marketable securities in deferred compensation plan 2,648  
Fair value measurement on a recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other    
Assets:    
Marketable securities in deferred compensation plan 14  
Fair value measurement on a recurring basis | Significant Other Observable Inputs (Level 2)    
Assets:    
Other marketable securities 0  
Interest rate derivatives 46  
Total assets 46  
Liabilities:    
Deferred compensation plan liability 2,662  
Interest rate derivatives 6,646  
Total liabilities 9,308  
Fair value measurement on a recurring basis | Significant Other Observable Inputs (Level 2) | Mutual funds    
Assets:    
Marketable securities in deferred compensation plan 0  
Fair value measurement on a recurring basis | Significant Other Observable Inputs (Level 2) | Other    
Assets:    
Marketable securities in deferred compensation plan 0  
Fair value measurement on a recurring basis | Significant Unobservable  Inputs (Level 3)    
Assets:    
Other marketable securities 0  
Interest rate derivatives 0  
Total assets 0  
Liabilities:    
Deferred compensation plan liability 0  
Interest rate derivatives 0  
Total liabilities 0  
Fair value measurement on a recurring basis | Significant Unobservable  Inputs (Level 3) | Mutual funds    
Assets:    
Marketable securities in deferred compensation plan 0  
Fair value measurement on a recurring basis | Significant Unobservable  Inputs (Level 3) | Other    
Assets:    
Marketable securities in deferred compensation plan $ 0