CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash Flows from Operating Activities:
Net income	$ 130,291	$ 133,549	$ 99,717
Operating distributions received from unconsolidated joint ventures	10	11	579
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	107,956	119,288	127,733
Amortization of debt issuance costs net of favorable settlement of interest rate swaps	(250)	1,588	1,702
Other amortization	58,330	73,944	74,373
Impairment loss on real estate assets	0	46,461	33,901
Loss on extinguishment of debt	(1,665)	0	0
Stock compensation expense	9,737	9,196	7,928
Equity in income of unconsolidated joint ventures	0	(3,845)	(362)
Gain on sale of real estate assets	(75,691)	(115,874)	(93,410)
Changes in assets and liabilities:
Increase in tenant and straight-line rent receivables, net	(16,094)	(21,392)	(26,747)
Decrease/(increase) in prepaid expenses and other assets	(3,095)	384	1,437
Increase/(decrease) in accounts payable and accrued expenses	(9,092)	(1,521)	3,555
Increase/(decrease) in deferred income	(898)	1,016	1,441
Net cash provided by operating activities	202,869	242,805	231,847
Cash Flows from Investing Activities:
Acquisition of real estate assets and intangibles	(151,914)	(35,262)	(349,668)
Capitalized expenditures	(72,105)	(79,831)	(110,228)
Net sale proceeds from wholly-owned properties	575,227	375,518	365,918
Net sale proceeds received from unconsolidated joint ventures	0	12,334	0
Investments in unconsolidated joint ventures	0	(1,162)	0
Note receivable issuance	(3,200)	0	0
Note receivable repayment	3,200	0	0
Deferred lease costs paid	(27,430)	(30,985)	(25,896)
Net cash provided by/(used in) investing activities	323,778	240,612	(119,874)
Cash Flows from Financing Activities:
Debt issuance and other costs paid	(1,040)	(132)	(264)
Proceeds from debt	977,062	180,000	695,000
Repayments of debt	(1,020,455)	(476,401)	(706,875)
Costs of issuance of common stock	(85)	(182)	(342)
Value of shares withheld for payment of taxes related to employee stock compensation	(2,219)	(3,403)	(2,344)
Repurchases of common stock as part of announced plan	(298,538)	(60,474)	(7,943)
Dividends paid and discount on dividend reinvestments	(184,093)	(122,274)	(91,616)
Net cash used in financing activities	(529,368)	(482,866)	(114,384)
Net increase/(decrease) in cash, cash equivalents, and restricted cash and escrows	(2,721)	551	(2,411)
Cash, cash equivalents, and restricted cash and escrows, beginning of year	8,755	8,204	10,615
Cash, cash equivalents, and restricted cash and escrows, end of year	$ 6,034	$ 8,755	$ 8,204