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Property and equipment, net (Tables)
12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
Schedule of property and equipment, net
Property and equipment, net consist of the following at year-end: 
 20202019
Land$134,148 $146,517 
Buildings and leasehold improvements657,652 710,046 
Equipment734,995 784,181 
Total cost1,526,795 1,640,744 
Total accumulated depreciation(730,263)(679,758)
 $796,532 $960,986