Stock-Based Compensation (Details) - Incentive Plan [Member] - Unvested Restricted Stock [Member]	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Unvested Outstanding at beginning balance | shares	2,251,059	[1]
Granted | shares	746,522
Forfeited | shares	(13,353)
Vested | shares	(1,412,264)
Unvested Outstanding at ending balance | shares	1,571,964
Weighted average grant date fair value per share
Unvested Outstanding at beginning balance | $ / shares	$ 6.19
Granted | $ / shares	6.53
Forfeited | $ / shares	(6.81)
Vested | $ / shares	(6.10)
Unvested Outstanding at ending balance | $ / shares	$ 6.43

[1] The number of unvested RSUs shown at September 30, 2018 includes RSUs awarded under the 2018 Plan in September 2018 subject to stockholder approval which was obtained in May 2019.