Share Based Compensation (Schedule of Restricted Stock Unit Activity) (Details) - Restricted stock units - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Units (Thousands)
Outstanding at beginning of period (in shares)	3,150,000	1,033,000	554,000
Granted (in shares)	985,000	2,166,000	745,000
Issued (in shares)	(1,543,000)	(36,000)	(265,000)
Deferred (in shares)	75,000	0	159,000
Forfeited (in shares)	(255,000)	(13,000)	(160,000)
Outstanding at end of period (in shares)	2,411,502	3,150,000	1,033,000
Weighted-Average Grant-Date Fair Value
Outstanding at beginning of period (in dollars per share)	$ 2.89	$ 2.84	$ 5.22
Granted (in dollars per share)	1.36	2.94	1.32
Issued (in dollars per share)	2.60	3.72	4.84
Deferred (in dollars per share)	1.30	0	3.69
Forfeited (in dollars per share)	2.77	3.02	1.53
Outstanding at end of period (in dollars per share)	$ 2.34	$ 2.89	$ 2.84