XML 48 R37.htm IDEA: XBRL DOCUMENT v3.20.2
Fair Value (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Fair Value on a Recurring Basis [Member]    
Financial Assets [Abstract]    
Cash equivalents and current investments $ 68,422 $ 54,642
Other long-term assets 205 3,216
Life insurance contracts 39,967 41,707
Financial assets 108,594 99,565
Fair Value on a Recurring Basis [Member] | Level 1 [Member]    
Financial Assets [Abstract]    
Cash equivalents and current investments 68,422 54,642
Other long-term assets 205 3,216
Life insurance contracts 0 0
Financial assets 68,627 57,858
Fair Value on a Recurring Basis [Member] | Level 2 [Member]    
Financial Assets [Abstract]    
Cash equivalents and current investments 0 0
Other long-term assets 0 0
Life insurance contracts 0 0
Financial assets 0 0
Fair Value on a Recurring Basis [Member] | Level 3 [Member]    
Financial Assets [Abstract]    
Cash equivalents and current investments 0 0
Other long-term assets 0 0
Life insurance contracts 39,967 41,707
Financial assets 39,967 $ 41,707
Life Insurance Contracts [Member]    
Changes in Fair Value of Level 3 Marketable Securities [Roll Forward]    
Beginning balance 41,707  
Actual return on plan assets (1,740)  
Purchases and issuances 0  
Sales and settlements 0  
Transfers into Level 3 0  
Ending balance $ 39,967