Issuances of Common Stock - At-the-Market (ATM) Program (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
At-the-Market (ATM) Programs
Gross proceeds	$ 3,179,490	$ 1,094,938	$ 1,264,518
ATM Program
At-the-Market (ATM) Programs
At-the-Market equity distribution program, authorized shares (in shares)	69,088,433
Shares remaining for future issuance (in shares)	29,387,491
Common stock | ATM Program
At-the-Market (ATM) Programs
Shares of common stock issued (in shares)	46,290,540	17,724,374	17,051,456
Gross proceeds	$ 3,207,900	$ 1,094,900	$ 1,274,500