CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Operating Activities
Net income	$ 77,249	$ 85,664
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	82,238	80,500
Equity in losses (earnings) of real estate ventures	179	(10,788)
Equity compensation expense	3,603	3,314
Accretion of fair market value adjustment of debt	(354)	(360)
Changes in other operating accounts:
Other assets	324	(2,388)
Accounts payable and accrued expenses	23,940	19,409
Other liabilities	1,336	1,913
Net cash provided by operating activities	188,515	177,264
Investing Activities
Acquisitions of storage properties	(72,814)	(45,417)
Additions and improvements to storage properties	(30,772)	(16,484)
Development costs	(18,180)	(71,684)
Cash paid for partner's interest in real estate venture, net of cash, cash equivalents and restricted cash acquired		(117,959)
Investment in real estate ventures	(5,908)	(3,166)
Cash distributed from real estate ventures	3,149	3,867
Net cash used in investing activities	(124,525)	(250,843)
Proceeds from:
Unsecured senior notes		347,746
Revolving credit facility	127,217	621,401
Principal payments on:
Revolving credit facility	(111,817)	(663,714)
Unsecured term loans		(200,000)
Mortgage loans and notes payable	(1,262)	(1,385)
Loan procurement costs		(3,026)
Settlement of hedge transactions		(807)
Acquisition of noncontrolling interest in subsidiary, net		(32,790)
Proceeds from issuance of common shares, net	(188)	135,101
Cash paid upon vesting of restricted shares	(650)	(378)
Exercise of stock options	135	2,011
Distributions paid to noncontrolling interests in subsidiaries	(101)	(74)
Distributions paid to common shareholders	(128,074)	(120,379)
Distributions paid to noncontrolling interests in Operating Partnership	(1,299)	(1,226)
Net cash (used in) provided by financing activities	(116,039)	82,480
Change in cash, cash equivalents and restricted cash	(52,049)	8,901
Cash, cash equivalents and restricted cash at beginning of period	58,441	6,482
Cash, cash equivalents and restricted cash at end of period	6,392	15,383
Supplemental Cash Flow and Noncash Information
Cash paid for interest, net of interest capitalized	37,726	32,220
Supplemental disclosure of noncash activities:
Acquisitions of storage properties	(2,623)
Proceeds held in escrow from real estate venture's sale of real estate (see note 4)		8,288
Noncash consideration for acquisition of partner's interest in real estate venture (see note 4)		(8,288)
Issuance of note receivable (see note 12)		(946)
Discount on issuance of unsecured senior notes		2,254
Noncash drawdown on revolving credit facility		103,938
Repayment of unsecured term loan through noncash drawdown on revolving credit faciltiy		(100,000)
Accretion of put liability	1,792	5,308
Derivative valuation adjustment	$ 40	262
Loan procurement costs		(3,848)
Acquisition of noncontrolling interest in subsidiary		(4,828)
Contributions from noncontrolling interests in subsidiaries		$ 4,828