Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Oct. 27, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stockholders' Equity Note [Abstract]
Net proceeds from rights offering	$ 89,701	$ (166)	$ 89,867	$ 0
Rights offering, net (in shares)	5,000,596
Exercise price (in dollars per share)	$ 18.00