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Goodwill and Other Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Intangible Assets
The following is a summary of intangible assets at March 31, 2021 and December 31, 2020:
Estimated
Life
(Years)		March 31, 2021December 31, 2020
Gross Carrying
Amount		Accumulated
Amortization		Gross Carrying
Amount		Accumulated
Amortization
Amortizable intangible assets:
Customer lists and contracts
7—10
$645,765 $568,949 $645,739 $563,135 
Non-competition agreements
3—15
66,206 64,712 66,156 64,647 
Site locations152,413,111 1,615,056 2,412,745 1,593,805 
Other
2—15
50,038 38,818 50,018 38,625 
$3,175,120 $2,287,535 $3,174,658 $2,260,212 
Unamortizable intangible assets:
Goodwill$2,165,895 $253,536 $2,165,864 $253,536