Issuances of Common Stock - Issuance of Common Stock in an Overnight Offering (Details) - USD ($) $ in Thousands	1 Months Ended			12 Months Ended
	Jan. 31, 2021	Mar. 31, 2020	May 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Issuance of Common Stock
Proceeds from shares issuances, net				$ 728,883	$ 845,061	$ 0
Common stock | Underwritten Public Offering
Issuance of Common Stock
Shares of common stock issued (in shares)		9,690,500	12,650,000			0
Proceeds from shares issuances, net		$ 728,900	$ 845,400
Common stock | Underwritten Public Offering | Subsequent event
Issuance of Common Stock
Shares of common stock issued (in shares)	12,075,000
Proceeds from shares issuances, net	$ 669,600
Common stock | Underwriter Option
Issuance of Common Stock
Shares of common stock issued (in shares)		690,500
Common stock | Underwriter Option | Subsequent event
Issuance of Common Stock
Shares of common stock issued (in shares)	1,575,000