Equity and Capital Equity and Capital - Common Stock (Details) - USD ($)			12 Months Ended
	Feb. 03, 2021	Feb. 04, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Class of Stock [Line Items]
Stock Repurchased and Retired During Period, Value			$ 0	$ (32,778,000)	$ (213,851,000)
Common stock remaining available for Issuance			500,000,000
Common stock, shares issued			169,680,138	167,571,218
Net proceeds from common stock issuance			$ 125,608,000	$ 0	0
Stock Repurchase Program, Authorized Amount		$ 250,000,000
Stock Repurchase Program Expiration Date		Feb. 05, 2021
Common stock repurchased and retired			$ 0	(32,778,000)	$ (213,851,000)
Subsequent Event [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount	$ 250,000,000
Stock Repurchase Program Expiration Date	Feb. 03, 2023
ATM Equity Offering Program [Member]
Class of Stock [Line Items]
Shares issued under program					0
Forward Equity Offering [Member] | ATM Equity Offering Program [Member]
Class of Stock [Line Items]
Common stock, shares issued			1,894,845
Net proceeds from common stock issuance			$ 125,800,000
Maximum [Member]
Class of Stock [Line Items]
Equity Issuances, Common Shares Authorized for Issuance			500,000,000.0
Common Stock [Member]
Class of Stock [Line Items]
Stock Repurchased and Retired During Period, Value				(6,000)	$ (37,000)
Common stock repurchased and retired				$ (6,000)	$ (37,000)