Summary of Significant Accounting Policies - Computation of Earnings (Loss) per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Basic loss per share computation:
Net loss	$ (26,836)	$ (8,724)
Weighted average common shares - basic and diluted (in shares)	53,879,333	53,805,983
Basic and diluted loss per share (in dollars per share)	$ (0.50)	$ (0.16)