Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share - Summary of Anti-Dilutive Equivalent Units Outstanding Excluded From Calculation of Earnings Per Share (Details)

v3.7.0.1
Earnings Per Share - Summary of Anti-Dilutive Equivalent Units Outstanding Excluded From Calculation of Earnings Per Share (Details) - shares
shares in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Securities excluded from calculation (in shares) 6,816 7,608 9,252 7,608
Common stock purchase warrants (in shares)        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Securities excluded from calculation (in shares) 4,163 5,632 6,599 5,632
Stock options (in shares)        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Securities excluded from calculation (in shares) 2,578 1,892 2,578 1,892
Restricted shares of common stock (in shares)        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Securities excluded from calculation (in shares) 75 84 75 84