Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Provisions for depreciation      
Depreciation $ 30,364 $ 27,381 $ 24,725
Furniture Fixtures and Operating Equipment [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Useful lives of the assets 10 years    
Furniture Fixtures and Operating Equipment [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Useful lives of the assets 2 years    
Building [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Useful lives of the assets 40 years    
Building [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Useful lives of the assets 10 years