CONSOLIDATED STATEMENTS OF CASH FLOWS - Unaudited - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
OPERATING ACTIVITIES
Net Income	$ 47,012	$ 49,950
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	44,493	41,090
Stock-based compensation expense	2,823	3,087
Net gain (loss) on sales of real estate investments and non-operating real estate	(10,308)	(21,815)
Gain on casualties and involuntary conversion	(1,150)	0
Changes in operating assets and liabilities:
Accrued income and other assets	2,111	1,539
Accounts payable, accrued expenses and prepaid rent	(12,075)	(7,310)
Other	828	654
NET CASH PROVIDED BY OPERATING ACTIVITIES	73,734	67,195
INVESTING ACTIVITIES
Real estate development	(61,023)	(47,767)
Purchases of real estate	(27,660)	(36,739)
Real estate improvements	(16,126)	(11,106)
Net proceeds from sales of real estate investments and non-operating real estate	16,826	39,934
Proceeds from casualties and involuntary conversion	890	0
Repayments on mortgage loans receivable	1,958	64
Changes in accrued development costs	7,350	2,826
Changes in other assets and other liabilities	(5,240)	(7,572)
NET CASH USED IN INVESTING ACTIVITIES	(83,025)	(60,360)
FINANCING ACTIVITIES
Proceeds from unsecured bank credit facilities	216,672	193,658
Repayments on unsecured bank credit facilities	(233,989)	(217,640)
Proceeds from Unsecured Debt	60,000	0
Repayments of Unsecured Debt	(50,000)	0
Repayments on secured debt	(5,570)	(7,098)
Debt issuance costs	(1,845)	(110)
Distributions paid to stockholders (not including dividends accrued on unvested restricted stock)	(45,449)	(42,690)
Proceeds from common stock offerings	74,789	69,105
Proceeds from dividend reinvestment plan	112	113
Other	(5,193)	(2,617)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	9,527	(7,279)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	236	(444)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	16	522
CASH AND CASH EQUIVALENTS AT END OF PERIOD	252	78
SUPPLEMENTAL CASH FLOW INFORMATION
Cash paid for interest, net of amount capitalized of $3,003 and $2,958 for 2018 and 2017, respectively	$ 16,528	$ 17,160