Condensed Consolidated Statement of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net income	$ 15,554	$ 5,678
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	22,356	19,227
Non-cash interest income adjustments	18	0
Amortization of deferred financing costs	2,620	1,507
Stock-based compensation expense	5,749	3,249
Amortization of premium on notes payable	(12)	(11)
Amortization of premium on senior unsecured notes	(139)	0
Straight-line rental income adjustments	(2,857)	(720)
Changes in operating assets and liabilities:
Prepaid expenses and other assets	116	556
Accounts payable and accrued liabilities	7,211	7,860
Restricted cash	(2,714)	(2,837)
Net cash provided by operating activities	47,902	34,509
Cash flows from investing activities:
Acquisitions of real estate	(98,050)	(187,700)
Origination of note receivable	(22,111)	0
Acquisition of note receivable	0	(5,348)
Additions to real estate	(1,039)	(86)
Net cash used in investing activities	(121,200)	(193,134)
Cash flows from financing activities:
Proceeds from secured revolving credit facility	42,500
Proceeds from mortgage notes payables	35,829	0
Proceeds from issuance of senior unsecured notes	106,000	0
Payments on secured revolving credit facility	(42,500)	0
Principal payments on mortgage notes payable	(36,701)	(2,249)
Payments of deferred financing costs	(7,045)	(495)
Issuance of common stock	144	163,431
Dividends paid	(36,702)	(19,878)
Net cash provided by (used in) financing activities	61,525	140,809
Net decrease in cash and cash equivalents	(11,773)	(17,816)
Cash and cash equivalents, beginning of period	42,250	74,233
Cash and cash equivalents, end of period	30,477	56,417
Supplemental disclosure of cash flow information:
Interest paid	$ 17,116	$ 17,024