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		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net income (loss) attributable to SBA Communications Corporation	$ 22,813	$ 31,973	$ (104,247)	$ 57,962
Basic weighted-average shares outstanding	111,738	113,205	111,823	112,958
Dilutive impact of stock options and restricted shares	1,896	1,735		1,685
Diluted weighted-average shares outstanding	113,634	114,940	111,823	114,643
Net income (loss) per common share attributable to SBA Communications Corporation:
Basic	$ 0.20	$ 0.28	$ (0.93)	$ 0.51
Diluted	$ 0.20	$ 0.28	$ (0.93)	$ 0.51