Share Based Compensation (Schedule of Adjusted EBITDA Vesting Awards Activity) (Details) - Adjusted EBITDA Based Performance - $ / shares	12 Months Ended			24 Months Ended	36 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2015	Jun. 30, 2017
Weighted-Average Grant-Date Fair Value
Outstanding at beginning of period (in shares)	908,000	908,000	723,000
Granted (in shares)	705,000	0	1,058,000	1,357,942
Adjustment for performance results achieved (in shares)	0	0	(708,000)
Vested (in shares)	(62,000)	0	0
Forfeited (in shares)	(78,000)	0	(165,000)
Outstanding at end of period (in shares)	1,473,000	908,000	908,000
Units (Thousands)
Outstanding at beginning of period (in dollars per share)	$ 1.30	$ 1.30	$ 9.67
Granted (in dollars per share)	1.64	0	1.30
Adjustment for performance results achieved (in dollars per share)	0	0	9.65
Vested (in dollars per share)	1.64	0	0
Forfeited (in dollars per share)	1.52	0	2.11
Outstanding at end of period (in dollars per share)	$ 1.44	$ 1.30	$ 1.30
Award requisite service period	3 years		3 years		3 years