Equity (Tables)

12 Months Ended

Dec. 31, 2017

Equity [Abstract]

Summary of the At-The-Market Equity Offering Program

The following table summarizes the ATM Program and Prior ATM Program activity for 2017 (shares and dollars in thousands, except per share amounts):

	For the Three Months Ended
	March 31, 2017		June 30, 2017		September 30, 2017		December 31, 2017		Total
Number of shares	7,175		3,399		—		—		10,574
Average sales price per share	$	15.31	$	18.82	$	—	$	—	$	16.43
Gross proceeds	$	109,813	$	63,947	$	—	$	—	$	173,760