Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLANS - Major categories of assets in the Company's pension plan (Details)

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EMPLOYEE BENEFIT PLANS - Major categories of assets in the Company's pension plan (Details) - Defined benefit pension plan [Member] - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]        
Fair Value of Plan Assets $ 165,274 $ 171,775 $ 161,646 $ 134,535
U.S. Treasury Securities [Member] | Level 1 Inputs [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Fair Value of Plan Assets 200 405    
Mutual Funds [Member] | Level 1 Inputs [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Fair Value of Plan Assets 156,726 155,192    
Cash and Cash Equivalents [Member] | Level 1 Inputs [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Fair Value of Plan Assets 6,881 12,789    
U.S. Government Agency [Member] | Level 2 Inputs [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Fair Value of Plan Assets 527 1,555    
Corporate Notes/Bonds [Member] | Level 2 Inputs [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Fair Value of Plan Assets $ 940 $ 1,834