Equity - Forward Equity Offering (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended			3 Months Ended	4 Months Ended	12 Months Ended
	Dec. 31, 2019	Nov. 30, 2019	Dec. 31, 2018	Mar. 31, 2020	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Noncontrolling Interest [Line Items]
Maximum shares issuable under forward equity sales agreement (in shares)								2,000,000.0
Forward rate per share (in usd per share)								$ 28.60
Issuance of common stock, net					$ 1,060,000	$ 1,067,071	$ 791,048	$ 215,179
Proceeds from issuance of common stock								$ 57,000
2019 Forward Equity Offering
Noncontrolling Interest [Line Items]
Maximum shares issuable under forward equity sales agreement (in shares)		15,600,000
Forward rate per share (in usd per share)		$ 34.46
Issuance of common stock, net (in shares)						0	0
Settlement alternatives, fair value (in shares)				15,600,000	15,600,000
Issuance of common stock, net				$ 534,000
2019 Forward Equity Offering | Maximum
Noncontrolling Interest [Line Items]
Sale of stock (in usd per share)				$ 34.18	$ 34.18
Forward Equity Offering
Noncontrolling Interest [Line Items]
Maximum shares issuable under forward equity sales agreement (in shares)			15,300,000				15,300,000
Forward rate per share (in usd per share)			$ 28.60	$ 31.38			$ 30.91
Issuance of common stock, net (in shares)	0
Issuance of common stock, net	$ 422,000
Option indexed to issuers equity, term			1 year			1 year
Forward Equity Offering | Maximum
Noncontrolling Interest [Line Items]
Sale of stock (in usd per share)	$ 27.66						$ 27.66