Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash Flows From Operating Activities
Net income	$ 55,570	$ 77,472
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	135,179	121,826
Amortization of non-cash items within interest expense	5,400	5,142
Amortization of acquired above- and below-market leases, net	(5,780)	(4,387)
Amortization of acquired below-market ground leases	5,873	5,873
Straight-lining of rental revenue	(13,781)	(16,662)
Equity based compensation	15,392	14,064
Increase (decrease) in cash flows due to changes in operating assets and liabilities:
Security deposits	(25,961)	(4,566)
Tenant and other receivables	149	(3,176)
Deferred leasing costs	(14,513)	(18,578)
Prepaid expenses and other assets	19,883	20,308
Accounts payable and accrued expenses	(2,970)	(1,181)
Deferred revenue and other liabilities	23,932	(8,732)
Net cash provided by operating activities	198,373	187,403
Cash Flows From Investing Activities
Short-term investments	400,000	(400,000)
Development costs	(2)	(1)
Additions to building and improvements	(189,666)	(169,622)
Net cash provided by (used in) investing activities	210,332	(569,623)
Cash Flows From Financing Activities
Proceeds from mortgage notes payable	0	160,000
Repayment of mortgage notes payable	(2,829)	(265,688)
Proceeds from unsecured senior notes	0	335,000
Repayment of unsecured senior notes	(250,000)	0
Proceeds from the sale of common stock	0	4,749
Deferred financing costs	0	(1,977)
Private perpetual preferred unit distributions	(702)	(702)
Dividends paid to common stockholders	(56,098)	(52,518)
Distributions paid to non-controlling interests in the operating partnership	(39,570)	(42,740)
Net cash (used in) provided by financing activities	(349,199)	136,124
Net increase (decrease) in cash and cash equivalents and restricted cash	59,506	(246,096)
Cash and cash equivalents and restricted cash—beginning of period	270,813	530,197
Cash and cash equivalents and restricted cash—end of period	330,319	284,101
Reconciliation of Cash and Cash Equivalents and Restricted Cash:
Cash and cash equivalents at beginning of period	204,981	464,344
Restricted cash at beginning of period	65,832	65,853
Cash and cash equivalents at end of period	293,710	229,745
Restricted cash at end of period	36,609	54,356
Supplemental disclosures of cash flow information:
Cash paid for interest	59,173	56,597
Cash paid for income taxes	1,589	3,690
Non-cash investing and financing activities:
Building and improvements included in accounts payable and accrued expenses	77,142	92,506
Write-off of fully depreciated assets	26,516	32,059
Derivative instruments at fair values included in prepaid expenses and other assets	0	9,944
Derivative instruments at fair values included in accounts payable and accrued expenses	28,850	0
Conversion of operating partnership units and Class B shares to Class A shares	21,654	$ 31,660
Right of use assets	29,452
Ground lease liabilities	$ 29,452