Stockholders' Equity (ATM Program) (Details) - USD ($)		1 Months Ended	9 Months Ended
		Oct. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Class of Stock [Line Items]
Total allowable shares (in shares)			375,000,000		375,000,000
Total shares issued (in shares)			178,731,891		175,635,792
Net proceeds			$ 131,407,000	$ 3,325,000
Stock issuance costs			$ 127,000	$ 17,125,000
Series F Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares redeemed (in shares)		13,800,000
Dividend rate		5.20%
Stated liquidation value per share (in dollars per share)		$ 25.00
Aggregate redemption price (in dollars per share)		$ 25.111944
Series F Preferred Stock Value		$ 345,000,000
Excess of redemption value over carrying value of preferred shares redeemed		$ 10,897,000
ATM equity programs
Class of Stock [Line Items]
Shares of common stock (in shares)			2,801,778	30,000
Average price per share (net) (in dollars per share)			$ 45.42	$ 35.35
Net proceeds			$ 127,270,000	$ 1,061,000
Stock issuance costs	[1]		$ 1,879,000	$ 173,000
2020 ATM
Class of Stock [Line Items]
Total allowable shares (in shares)			17,500,000
Total shares issued (in shares)			4,401,082

[1] Stock issuance costs consist primarily of underwriters' fees and commissions, and legal and accounting fees.