Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash Flows From Operating Activities
Net income	$ 85,993	$ 74,242
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	119,868	115,382
Amortization of non-cash items within interest expense	919	516
Amortization of acquired above- and below-market leases, net	(4,154)	(6,285)
Amortization of acquired below-market ground leases	5,873	5,873
Straight-lining of rental revenue	(20,590)	(21,495)
Equity based compensation	10,808	7,254
Settlement of derivative contracts	(6,335)	0
Loss on early extinguishment of debt	2,157	552
Increase (decrease) in cash flows due to changes in operating assets and liabilities:
Restricted cash	(703)	3,120
Tenant and other receivables	(12,119)	(788)
Deferred leasing costs	(21,660)	(18,642)
Prepaid expenses and other assets	13,672	16,775
Accounts payable and accrued expenses	(8,917)	(7,223)
Deferred revenue and other liabilities	9,108	(7,213)
Net cash provided by operating activities	173,920	162,068
Cash Flows From Investing Activities
(Increase) decrease in restricted cash for investing activities	(1,590)	558
Development costs	(27)	(450)
Additions to building and improvements	(157,579)	(120,401)
Net cash used in investing activities	(159,196)	(120,293)
Cash Flows From Financing Activities
Proceeds from mortgage notes payable	315,000	50,000
Repayment of mortgage notes payable	(344,618)	(29,220)
Proceeds from unsecured revolving credit facility and term loan	265,000	50,000
Repayments of unsecured revolving credit facility and term loan	(265,000)	(90,000)
Net proceeds from the sale of common stock	0	611,278
Deferred financing costs	(12,186)	(2,905)
Private perpetual preferred unit distributions	(702)	(702)
Dividends paid to common stockholders	(49,843)	(39,491)
Distributions paid to non-controlling interests in the operating partnership	(44,641)	(43,123)
Net cash (used in) provided by financing activities	(136,990)	505,837
Net (decrease) increase in cash and cash equivalents	(122,266)	547,612
Cash and cash equivalents—beginning of period	554,371	46,685
Cash and cash equivalents—end of period	432,105	594,297
Supplemental disclosures of cash flow information:
Cash paid for interest	53,918	53,286
Cash paid for income taxes	5,004	3,495
Non-cash investing and financing activities:
Building and improvements included in accounts payable and accrued expenses	72,130	71,444
Derivative instruments at fair values included in accounts payable and accrued expenses	13,378	31,227
Conversion of operating partnership units and Class B shares to Class A shares	$ 11,087	$ 19,941