Stockholders' Equity (DRIP) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Feb. 28, 2018
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	375,000,000		375,000,000
Net proceeds	$ 54,084	$ 87,978
DRIP
Class of Stock [Line Items]
Common stock, shares authorized (in shares)				10,000,000
Shares of common stock (in shares)	33,246	137,316
Net proceeds	$ 1,321	$ 7,166