Warrants, Restricted Stock, Restricted Stock Units, Options and Option Matching Rights - Schedule of Restricted Stock and Restricted Stock Units Activity (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding, (in shares)	216,000	137,000	37,000
Grants in period, (in shares)	1,000	105,000	120,000
Vested in period, (in shares)	(55,000)	(22,000)	(20,000)
Forfeited in period, (in shares)	(22,000)	(4,000)
Outstanding, (in shares)	140,000	216,000	137,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding, (in shares)	0	0	0
Grants in period, (in shares)	74,500	0	0
Vested in period, (in shares)	0	0	0
Forfeited in period, (in shares)	(1,600)	0
Outstanding, (in shares)	72,900	0	0