XML 302 R109.htm IDEA: XBRL DOCUMENT v3.22.0.1
Employee Retirement Plans (Fair Value of Retirement Benefit Plan Assets) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets $ 8,010 $ 8,287
Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 82 94
Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 7,928 8,193
Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0 0
Equity mutual funds    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 2,341 2,405
Equity mutual funds | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0 0
Equity mutual funds | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 2,341 2,405
Equity mutual funds | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0 0
Fixed income mutual funds    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 5,587 5,788
Fixed income mutual funds | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0 0
Fixed income mutual funds | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 5,587 5,788
Fixed income mutual funds | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0 0
Money market funds and cash    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 82 94
Money market funds and cash | Level 1    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 82 94
Money market funds and cash | Level 2    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets 0 0
Money market funds and cash | Level 3    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets $ 0 $ 0