Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended		20 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Nov. 30, 2020
Common stock.
Gross Proceeds		$ 252,873	$ 172,372
2020 ATM Program
Common stock.
Shares Sold	3,068,633	8,607,771		19,449,302
Weighted Average Price per Share	$ 27.52	$ 29.38		$ 31.55
Gross Proceeds	$ 84,400	$ 252,900		$ 613,700
Sales Agents' Commissions	(900)	(3,100)		(8,500)
Other Offering Expenses	(100)	(200)		(800)
Net Proceeds	$ 83,400	$ 249,600		$ 604,400
Maximum value of shares that can be offered and sold					$ 900,000