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Supplemental Cash Flow Information (Tables)
12 Months Ended
Dec. 31, 2020
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information
The table below provides supplemental cash flow information:
 Year ended December 31,
 202020192018
Cash paid:   
Income taxes, net$154,850 $157,983 $92,526 
Interest$326,165 $473,176 $488,974 
Non-cash investing and financing activities:   
Fixed assets under financing lease obligations$22,042 $18,953 $8,828