Earnings per Common Share (Reconciliation of Net Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings per Common Share [Abstract]
Common Stockholders	$ (11,095)	$ (47,786)	$ (16,721)	$ (95,898)
Net loss	$ (11,095)	$ (47,786)	$ (16,721)	$ (95,898)