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Supplemental Cash Flow Information
12 Months Ended
Dec. 31, 2020
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information SUPPLEMENTAL CASH FLOW INFORMATION
 Year Ended December 31,
 202020192018
Cash paid during the period for:   
 Interest, including interest related to finance leases$118,851 $118,974 $107,021 
 Income taxes, net41,372 44,184 26,529 
Non-cash investing and financing activities:  
 Issuance of stock dividend— 703 671 
 Decrease in non-controlling interest related to purchase of subsidiary— — (73,953)
Notes payable issued for purchase of subsidiary
— — 30,000 
Contingent consideration related to purchase of subsidiary
— — 6,304 
Net receivable from purchase of subsidiary
— — 497