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Fair Value (Reconciliation Of Level 3 Input For Financial Instruments Measured On Recurring Basis) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Mar. 31, 2020
Dec. 31, 2019
Mar. 31, 2019
Dec. 31, 2018
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Included in other comprehensive income $ 8 $ 0 $ 15 $ 9        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Reconciliation Of Level 3 Input For Financial Instruments Measured On Recurring Basis    
The tables below present a reconciliation of the beginning and ending balances of the Level 3 inputs for the three months and six months ended June 30, 2020 and 2019, for financial instruments measured on a recurring basis and classified as Level 3:

Level 3 Fair Value Measurements
Three months ended June 30, 2020 and 2019
(In thousands)Equity
Securities		Fair value
swap
Balance at April 1, 2020$463  $(226) 
Total gains/(losses)  
Included in other income8  —  
Balance at June 30, 2020$471  $(226) 
Balance at April 1, 2019$433  $(226) 
Total gains/(losses)  
Included in other income—  —  
Balance at June 30, 2019$433  $(226) 

Level 3 Fair Value Measurements
Six months ended June 30, 2020 and 2019

(In thousands)Equity
Securities		Fair value
swap
Balance at January 1, 2020$456  $(226) 
Total gains/(losses)  
Included in other income15  —  
Balance at June 30, 2020$471  $(226) 
Balance at January 1, 2019$424  $(226) 
Total gains/(losses)  
Included in other income9  —  
Balance at June 30, 2019$433  $(226) 
          
Fair Value, Recurring [Member] | Equity Securities [Member]                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Investments, Fair Value Disclosure 2,131   $ 2,131     $ 1,993    
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Equity Securities [Member]                
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]                
Investments, Fair Value Disclosure 471   471     456    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Balance, beginning 471 433 471 433 $ 463 456 $ 433 $ 424
Balance, ending 471 433 471 433 463 456 433 424
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Swap [Member]                
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Balance, beginning (226) (226) (226) (226) (226) (226) (226) (226)
Included in other comprehensive income   0   0        
Balance, ending $ (226) $ (226) $ (226) $ (226) $ (226) $ (226) $ (226) $ (226)