Equity - At-The-Market Offering Program (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Class of Stock [Line Items]
Gross proceeds		$ 195,963
Commissions paid on stock issuance	$ 404
Prior ATM Program
Class of Stock [Line Items]
Number of shares (in shares)		2,459
Average sales price per share (usd per share)		$ 19.48
Gross proceeds		$ 47,893
Commissions paid on stock issuance		$ 600