Loss Per Common Share (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dividends cancelled      
Dividends cancelled $ 5,063    
Common shares      
Shares with anti-dilutive effect, not included in calculation of earnings per share 3,411,270 1,698,569 3,437,148
Convertible Preferred Stock      
Shares with anti-dilutive effect, not included in calculation of earnings per share 5,935,000 6,522,556 7,950,425