Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 34,842	$ 39,780	$ 30,294
Adjustments to reconcile net income to net cash provided by operating activities:
Change in fair value of derivatives	7	(36)	1,332
Gain on sale of property, discontinued operations	0	(4,510)	0
Gain on casualty settlement, continuing operations	(77)	(219)	(245)
Depreciation and amortization of deferred leasing costs	49,130	40,189	35,400
Amortization of deferred debt costs	1,257	1,576	1,547
Non cash compensation costs of stock grants and options	1,145	952	948
Provision for credit losses	968	1,151	1,883
(Increase) decrease in accounts receivable and accrued income	(3,669)	(3,240)	(5,291)
Additions to deferred leasing costs	(5,876)	(5,362)	(6,257)
(Increase) decrease in prepaid expenses	(152)	(54)	(844)
(Increase) decrease in other assets	353	9,573	(3,668)
Increase (decrease) in accounts payable, accrued expenses and other liabilities	(3,286)	(930)	1,478
Decrease in deferred income	(1,115)	(447)	(908)
Net cash provided by operating activities	73,527	78,423	55,669
Cash flows from investing activities:
Acquisitions of real estate investments, net	(5,124)	(34,050)	(170,100)
Additions to real estate investments	(13,999)	(12,680)	(11,624)
Additions to development and redevelopment projects	(7,316)	(7,913)	(20,780)
Proceeds from sale of properties	0	5,818	0
Proceeds from casualty settlement	405	1,952	1,004
Net cash used in investing activities	(26,034)	(46,873)	(201,500)
Cash flows from financing activities:
Proceeds from mortgage notes payable	101,600	83,500	286,000
Repayments on mortgage notes payable	(71,308)	(117,595)	(82,685)
Proceeds from construction loans payable	0	0	13,410
Repayments on construction loans payable	0	0	(104,243)
Proceeds from revolving credit facility	142,000	38,000	16,000
Repayments on revolving credit facility	(180,000)	(8,000)	(8,000)
Additions to deferred debt costs	(3,219)	(2,199)	(1,445)
Proceeds from the issuance of:
Common stock	22,292	27,784	27,101
Partnership units	4,144	0	49,589
Preferred stock redemption costs	(9)	0	0
Distributions to:
Preferred stockholders	(14,561)	(15,140)	(15,140)
Common stockholders	(29,205)	(28,135)	(27,062)
Noncontrolling interest	(9,956)	(9,955)	(8,339)
Net cash provided by (used in) financing activities	(42,329)	(31,740)	145,186
Net increase (decrease) in cash and cash equivalents	5,164	(190)	(645)
Cash and cash equivalents, beginning of year	12,133	12,323	12,968
Cash and cash equivalents, end of year	17,297	12,133	12,323
Supplemental disclosure of cash flow information:
Cash paid for interest	45,743	48,302	42,948
Series A Preferred Stock
Proceeds from the issuance of:
Preferred stock redemption payments	(60,000)	0	0
Distributions to:
Preferred stockholders	(5,213)	(8,000)	(8,000)
Series B Preferred Stock
Proceeds from the issuance of:
Preferred stock redemption payments	(79,328)	0	0
Distributions to:
Preferred stockholders	(3,253)	(7,140)	(7,140)
Series C Preferred Stock
Proceeds from the issuance of:
Series C preferred stock	135,221	0	0
Distributions to:
Preferred stockholders	$ (6,095)	$ 0	$ 0