Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Weighted-Average Shares of Common Stock Outstanding used in Calculation of Basic and Diluted Earnings Per Share	For the three months For the nine months ended September 30, ended September 30, 2021 2020 2021 2020Numerator: Net income (loss) attributable to SBA Communications Corporation $ 47,798 $ 22,568 $ 188,720 $ (81,678)Denominator: Basic weighted-average shares outstanding 109,577 111,783 109,487 111,809Dilutive impact of stock options, RSUs, and PSUs 1,988 1,920 1,842 —Diluted weighted-average shares outstanding 111,565 113,703 111,329 111,809Net income (loss) per common share attributable to SBA Communications Corporation: Basic $ 0.44 $ 0.20 $ 1.72 $ (0.73)Diluted $ 0.43 $ 0.20 $ 1.70 $ (0.73)