Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 21,839	$ 130	$ 23,276	$ 2,521
Other comprehensive income (loss):
Income (loss) on interest rate swaps	598	2,863	300	(14,028)
Other comprehensive income (loss)	598	2,863	300	(14,028)
Comprehensive income (loss)	22,437	2,993	23,576	(11,507)
(Income) loss attributable to noncontrolling interest after preferred stock dividends	(828)	190	(673)	424
Other comprehensive (income) loss attributable to noncontrolling interest	(26)	(140)	(13)	709
Comprehensive income (loss) attributable to STAG Industrial, Inc.	$ 21,583	$ 3,043	$ 22,890	$ (10,374)