Annual report pursuant to Section 13 and 15(d)

FAIR VALUE MEASUREMENT (Details)

v3.10.0.1
FAIR VALUE MEASUREMENT (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
insurance_policy
Dec. 31, 2017
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Number of life insurance policies | insurance_policy 70  
Life insurance policies, net face value $ 43,400  
Cash surrender value of life insurance policies 18,300 $ 18,300
Deferred compensation assets 18,400 18,400
Deferred Compensation Arrangement with Individual, by Type of Compensation, Pension and Other Postretirement Benefits [Member] | Fair Value, Inputs, Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents 148 95
Total fair value 148 95
Deferred Compensation Arrangement with Individual, by Type of Compensation, Pension and Other Postretirement Benefits [Member] | Estimate of Fair Value Measurement [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents 148 95
Total fair value $ 148 $ 95