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Net Income Per Share
 6 Months Ended
Jun. 30, 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 
 June 30,
 
Six Months Ended 
 June 30,
 
2017
 
2016
 
2017
 
2016
Net loss allocable to common stockholders (in millions)
$
(24.4
)
 
$
(2.9
)
 
$
(17.8
)
 
$
(17.5
)
 
 
 
 
 
 
 
 
Shares in thousands:
 
 
 
 
 
 
 
Average common shares outstanding - basic
9,077

 
9,080

 
9,070

 
9,071

Potentially dilutive shares related to stock options (a)
—

 
—

 
—

 
—

Average common shares outstanding - diluted
9,077

 
9,080

 
9,070

 
9,071

 
 
 
 
 
 
 
 
Net loss per common share – basic and diluted
(2.69
)
 
$
(0.32
)
 
$
(1.96
)
 
$
(1.92
)
 
 
 
 
 
 
 
 
(a) Common stock equivalents excluded from the diluted calculation as a result of a net loss in the period (in thousands)
56

 
14

 
84

 
7

 
 
 
 
 
 
 
 
Options outstanding and considered anti-dilutive as their exercise price exceeded the average share market price (in thousands)
30

 
375

 
30

 
490