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	$ 17,756	$ 15,098
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization from continuing operations	34,322	31,863
Depreciation and amortization from discontinued operations	0	80
Stock-based compensation expense	2,824	2,327
Gain on sales of land and real estate investments	(95)	0
Changes in operating assets and liabilities:
Accrued income and other assets	2,128	2,765
Accounts payable, accrued expenses and prepaid rent	(3,123)	743
Other	(80)	(62)
NET CASH PROVIDED BY OPERATING ACTIVITIES	53,732	52,814
INVESTING ACTIVITIES
Real estate development	(56,125)	(40,165)
Purchases of real estate	(41,751)	(69,952)
Real estate improvements	(9,912)	(9,501)
Proceeds from sales of real estate investments	3,471	0
Repayments on mortgage loans receivable	78	52
Changes in receivable for development infrastructure cost reimbursements	0	(1,351)
Changes in accrued development costs	12,076	2,970
Changes in other assets and other liabilities	(4,536)	(4,446)
NET CASH USED IN INVESTING ACTIVITIES	(96,699)	(122,393)
FINANCING ACTIVITIES
Proceeds from unsecured bank credit facilities	165,969	194,775
Repayments on unsecured bank credit facilities	(112,529)	(94,002)
Repayments on secured debt	(11,152)	(12,296)
Debt issuance costs	(42)	(1,459)
Distributions paid to stockholders (not including dividends accrued on unvested restricted stock)	(34,183)	(31,874)
Proceeds from common stock offerings	37,033	13,877
Proceeds from exercise of stock options	0	120
Proceeds from dividend reinvestment plan	103	105
Other	(2,221)	(915)
NET CASH PROVIDED BY FINANCING ACTIVITIES	42,978	68,331
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	11	(1,248)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	8	1,258
CASH AND CASH EQUIVALENTS AT END OF PERIOD	19	10
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid for interest, net of amount capitalized of $2,336 and $2,560 for 2014 and 2013, respectively	$ 17,350	$ 16,657