Income/(Loss) per Common Share - Narrative (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Warrants outstanding (in shares)	3,040,540	3,040,540
Number of securities called by warrants (in shares)	152,027	152,027	152,027
Minimum price per share to exercise for first half of warrants (in dollars per share)	$ 556.40	$ 556.40
Term of warrants	7 years
Stock Compensation Plan
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	687	1,716,928	1,413,461
Employee Stock Option
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	348,625	2,301,046	1,942,909