Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
OPERATING ACTIVITIES
Net income	$ 12,009	$ 9,429
Adjustments to reconcile income from operations to net cash provided by operating activities:
Deferred rent revenue and amortization of lease intangibles	(2,806)	(1,874)
Depreciation and amortization	34,550	33,966
Amortization of debt issuance costs and debt fair value adjustments	2,031	1,966
Stock-based compensation expense	1,526	1,393
Other, net	(368)	(481)
Changes in operating assets and liabilities
Change in restricted cash	(673)	(818)
Change in accounts receivable	2,379	(1,073)
Change in other assets	(377)	(38)
Change in accounts payable and accrued expenses	1,013	2,662
Change in security deposits payable	160	238
Change in other liabilities and deferred credits	890	303
Net cash provided by operating activities	50,334	45,673
INVESTING ACTIVITIES
Capital expenditures	(61,261)	(21,204)
Change in restricted cash	(969)	433
Leasing commissions	(1,628)	(1,344)
Net cash used in investing activities	(63,858)	(22,115)
FINANCING ACTIVITIES
Change in restricted cash	0	1,400
Repayment of secured notes payable	(784)	(1,839)
Proceeds from term loan	100,000	0
Repayment of line of credit	(93,000)	0
Debt issuance costs	(1,957)	0
Proceeds from issuance of common stock, net	69,909	24,922
Dividends paid to common stock and unitholders	(26,453)	(24,380)
Shares withheld for employee taxes	(4,319)	0
Net cash (used in) provided by financing activities	43,396	(2,697)
Net increase (decrease) in cash and cash equivalents	29,872	20,861
Cash and cash equivalents, beginning of period	48,987	42,479
Cash and cash equivalents, end of period	$ 78,859	$ 63,340