Annual report pursuant to Section 13 and 15(d)

EMPLOYEE BENEFIT PLANS (Details 2)

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EMPLOYEE BENEFIT PLANS (Details 2) - Defined benefit pension plan [Member] - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]        
Fair Value of Plan Assets $ 134,535 $ 129,719 $ 113,813 $ 105,792
U.S. Treasury [Member] | Level 1 Inputs [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Fair Value of Plan Assets 398 0    
Mutual Funds [Member] | Level 1 Inputs [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Fair Value of Plan Assets 112,131 118,474    
Cash and Cash Equivalents [Member] | Level 1 Inputs [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Fair Value of Plan Assets 16,788 7,103    
U.S. Government Agency [Member] | Level 2 Inputs [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Fair Value of Plan Assets 2,822 4,142    
DomesticCorporateDebtSecuritiesMember | Level 2 Inputs [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Fair Value of Plan Assets $ 2,396 $ 0