Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (4,680)	$ 251	$ (11,335)	$ (2,395)
Other comprehensive income (loss):
Income (loss) on interest rate swaps	(7,636)	1,300	(7,019)	(1,959)
Other comprehensive income (loss)	(7,636)	1,300	(7,019)	(1,959)
Comprehensive income (loss)	(12,316)	1,551	(18,354)	(4,354)
Net loss attributable to noncontrolling interest after preferred stock dividends	359	90	951	784
Other comprehensive (income) loss attributable to noncontrolling interest	371	(47)	343	146
Comprehensive income (loss) attributable to STAG Industrial, Inc.	$ (11,586)	$ 1,594	$ (17,060)	$ (3,424)