Quarterly report pursuant to Section 13 or 15(d)

Earnings (Loss) per Common Share (Weighted Average Shares Outstanding, Anti-dilutive) (Details)

v3.7.0.1
Earnings (Loss) per Common Share (Weighted Average Shares Outstanding, Anti-dilutive) (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]        
Antidilutive securities excluded from computation of earnings per share 1,948 3 1,643 5
Derivative instrument that may be settled in cash or shares, the effect of which is anti-dilutive [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share 1,921 0 1,616 0
Share-based compensation that may be settled in cash or shares, the effect of which is anti-dilutive [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share 26 0 26 0
Shares associated with anti-dilutive unexercised stock options        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share 1 3 1 5