Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended			3 Months Ended			4 Months Ended	9 Months Ended		12 Months Ended
	Feb. 29, 2020	Nov. 30, 2019	Dec. 31, 2018	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Mar. 31, 2020	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Class of Stock [Line Items]
Issuance of common stock, net				$ 511		$ 102,429	$ 1,060,000	$ 1,065,900	$ 509,242
At-The-Market Program
Class of Stock [Line Items]
Option indexed to issuers equity, term								1 year
2019 ATM Program
Class of Stock [Line Items]
Maximum shares issuable under forward equity sales agreement (in shares)						1,200,000		2,000,000.0	14,800,000
Forward equity sales agreement, initial net price (in usd per share)						$ 31.10		$ 35.23	$ 31.23
2019 ATM Program, Settled
Class of Stock [Line Items]
Share settlement (in shares)					16,800,000	5,500,000	16,800,000		5,500,000
Weighted average settlement price (in usd per share)					$ 31.38				$ 30.91
Issuance of common stock, net					$ 528,000				$ 171,000
Issuance of common stock, net (in shares)				0
Remainder outstanding (in shares)				0				0
ATM Direct Issuances
Class of Stock [Line Items]
Weighted average net price (in usd per share)						$ 31.84			$ 31.84
ATM Direct Issuances | Common Stock
Class of Stock [Line Items]
Issuance of common stock, net									$ 189,000
Issuance of common stock, net (in shares)				0				0	5,900,000
2020 ATM Program
Class of Stock [Line Items]
ATM aggregate amount authorized	$ 1,250,000
ATM aggregate amount remaining								$ 1,250,000
2019 Forward Equity Offering
Class of Stock [Line Items]
Maximum shares issuable under forward equity sales agreement (in shares)		15,600,000
Forward equity sales agreement, initial net price (in usd per share)		$ 34.46
Share settlement (in shares)					15,600,000		15,600,000
Issuance of common stock, net					$ 534,000
Issuance of common stock, net (in shares)								0		0
2019 Forward Equity Offering | Maximum
Class of Stock [Line Items]
Weighted average net price (in usd per share)					$ 34.18		$ 34.18
Forward Equity Offering
Class of Stock [Line Items]
Option indexed to issuers equity, term			1 year
Maximum shares issuable under forward equity sales agreement (in shares)			15,300,000
Forward equity sales agreement, initial net price (in usd per share)			$ 28.60
Share settlement (in shares)										15,300,000
Issuance of common stock, net						$ 100,000			$ 142,000	$ 422,000
Issuance of common stock, net (in shares)						3,600,000			5,100,000	0
Weighted average net price (in usd per share)						$ 27.85			$ 27.85
Forward Equity Offering | Maximum
Class of Stock [Line Items]
Weighted average net price (in usd per share)						$ 27.93			$ 27.93	$ 27.66