Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 1,368	$ (9,941)	$ 1,437	$ 2,391
Other comprehensive loss:
Loss on interest rate swaps	(1,510)	(5,068)	(298)	(16,891)
Other comprehensive loss	(1,510)	(5,068)	(298)	(16,891)
Comprehensive income (loss)	(142)	(15,009)	1,139	(14,500)
Net loss attributable to noncontrolling interest after preferred stock dividends	44	718	145	232
Other comprehensive loss attributable to noncontrolling interest	62	261	13	868
Comprehensive income (loss) attributable to STAG Industrial, Inc.	$ (36)	$ (14,030)	$ 1,297	$ (13,400)