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Net Income Per Share
 3 Months Ended
Mar. 31, 2017
Earnings Per Share [Abstract]  
Net Income (Loss) Per Share
NET INCOME (LOSS) PER COMMON SHARE

Basic net income (loss) per common share is calculated by dividing income (loss) allocable to common stockholders by the weighted average number of shares of common stock outstanding during the period. In calculating diluted net income (loss) per common share, the number of shares is increased by the weighted average number of potential shares related to stock compensation awards. No dilutive effect is recognized in a period in which a net loss has occurred.
 
Three Months Ended 
 March 31,
 
2017
 
2016
 
 
 
 
Net income (loss) allocable to common stockholders (in millions)
$
6.6

 
$
(14.6
)
 
 
 
 
Shares in thousands:
 
 
 
Average common shares outstanding - basic
9,063

 
9,063

Potentially dilutive shares related to stock options
111

 
—

Average common shares outstanding - diluted
9,174

 
9,063

 
 
 
 
Net income (loss) per common share:
 
 
 
    – Basic
$
0.73

 
$
(1.60
)
    – Diluted
$
0.72

 
$
(1.60
)
 
 
 
 
Options outstanding and considered anti-dilutive as their exercise price exceeded the average share market price (in thousands)
—

 
475