Earnings Per Share (Reconciliation of Shares Used in Calculating Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net loss	$ (124,974)	$ (107,594)	$ (96,071)
Weighted average number of shares outstanding, basic and diluted	69,606,105	65,888,450	62,593,026
Net loss per share, basic and diluted	$ (1.80)	$ (1.63)	$ (1.53)