Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 19,316	$ 14,170	$ 84,354	$ 21,559
Other comprehensive loss:
Loss on interest rate swaps	(2,009)	(16,028)	(32,200)	(23,006)
Other comprehensive loss	(2,009)	(16,028)	(32,200)	(23,006)
Comprehensive income (loss)	17,307	(1,858)	52,154	(1,447)
Income attributable to noncontrolling interest after preferred stock dividends	(407)	(408)	(2,005)	(622)
Other comprehensive loss attributable to noncontrolling interest	32	510	789	754
Comprehensive income (loss) attributable to STAG Industrial, Inc.	$ 16,932	$ (1,756)	$ 50,938	$ (1,315)