Earnings Per Share (Weighted-Average Shares of Common Stock Outstanding used in Calculation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net income attributable to SBA Communications Corporation	$ 48,902	$ 47,798	$ 152,669	$ (11,745)	$ 105,781	$ 22,568	$ 22,813	$ (127,058)	$ 237,624	$ 24,104	$ 146,991
Basic weighted-average shares outstanding									109,328	111,532	112,809
Dilutive impact of stock options, RSUs, and PSUs									1,849	1,933	1,884
Diluted weighted-average shares outstanding									111,177	113,465	114,693
Net income per common share attributable to SBA Communications Corporation:
Basic									$ 2.17	$ 0.22	$ 1.30
Diluted									$ 2.14	$ 0.21	$ 1.28