Consolidated and Combined Statements of Cash Flows (USD $) In Thousands	6 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2011	Apr. 19, 2011 STAG Predecessor Group	Sep. 30, 2010 STAG Predecessor Group
Cash flows from operating activities:
Net loss	$ (6,471)	$ (229)	$ (3,988)
Adjustment to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	14,778	2,459	8,458
Amortization of deferred financing costs	538	31	89
Intangible amortization in rental income	1,714	(2)	86
Tenant straight line receivable, net	(821)	(16)
(Gain) loss on interest rate swaps	(1,270)	(762)	1,029
Stock-based compensation expense	376
Change in assets and liabilities:
Tenant accounts receivable, net	(126)	88	(346)
Leasing commissions, net	(819)	(24)	(134)
Restricted cash	(551)
Prepaid expenses and other assets	(56)	(87)	39
Accounts payable, accrued expenses and other liabilities	1,902	106	(522)
Tenant prepaid rent and security deposits	1,217	169	(738)
Due to related parties	55	767	2,922
Due from related parties	91	(141)	28
Total adjustments	17,028	2,588	10,911
Net cash provided by operating activities	10,557	2,359	6,923
Cash flows from investing activities:
Additions of land and building improvements	(49,340)	(39)	(1,258)
Restricted cash	(1,834)	(542)	(302)
Cash paid for contributed assets, net	(425)
Cash paid for deal deposits, net	(2,159)
Additions to lease intangibles	(18,266)
Net cash used in investing activities	(72,024)	(581)	(1,560)
Cash flows from financing activities:
Proceeds from issuance of common stock, net	205,563
Offering costs related to issuance of common stock	(17,042)
Redemption of initial capitalization of STAG Industrial, Inc. shares	(2)
Proceeds from notes payable to related parties		789
Repayment of notes payable to related parties	(10,366)
Proceeds from secured corporate credit facility	28,500
Repayment of secured corporate credit facility	(11,000)
Proceeds from mortgage notes payable	40,438		(3,417)
Repayment of mortgage notes payable	(154,119)	(1,180)
Termination of interest rate swap contracts	(894)
Payment of deferred financing fees	(3,029)
Dividends and distributions	(4,871)	(2,679)	(3,062)
Net cash provided by (used in) financing activities	73,178	(3,070)	(6,479)
Increase (decrease) in cash and cash equivalents	11,711	(1,292)	(1,116)
Cash and cash equivalents-beginning of period	277	1,567	2,773
Cash and cash equivalents-end of period	$ 11,988	$ 275	$ 1,657