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Loss per Common Share
 12 Months Ended
Dec. 31, 2012
Earnings Per Share [Abstract]  
Loss Per Common Share
3. Loss per Common Share
 
The following table sets forth the computation of basic and diluted loss per common share from continuing operations for the years ended December 31:
 
 
 
2012
 
2011
 
2010
 
Numerator
 
 
 
 
 
 
 
 
 
 
Numerator for diluted loss per common share – loss from continuing operations
 
$
(71,500)
 
$
(72,757)
 
$
(177)
 
Net income attributable to the noncontrolling interests
 
 
(6,738)
 
 
(8,411)
 
 
(10,378)
 
Loss attributable to MDC Partners Inc. common shareholders from continuing operations
 
 
(78,238)
 
 
(81,168)
 
 
(10,555)
 
Effect of dilutive securities
 
 
—
 
 
—
 
 
—
 
Numerator for diluted income per common share – loss  attributable to MDC Partners Inc. common shareholders from continuing operations
 
$
(78,238)
 
$
(81,168)
 
$
(10,555)
 
Denominator
 
 
 
 
 
 
 
 
 
 
Denominator for basic loss per common share –  weighted average common shares
 
 
30,726,773
 
 
29,120,373
 
 
28,161,144
 
Effect of dilutive securities:
 
 
 
 
 
 
 
 
 
 
Dilutive potential common shares
 
 
—
 
 
—
 
 
—
 
Denominator for diluted loss per common share –  adjusted weighted shares and assumed conversions
 
 
30,726,773
 
 
29,120,373
 
 
28,161,144
 
Basic loss per common share from continuing operations
 
$
(2.55)
 
$
(2.79)
 
$
(0.38)
 
Diluted loss per common share from continuing operations
 
$
(2.55)
 
$
(2.79)
 
$
(0.38)
 
 
At December 31, 2012, 2011 and 2010, warrants, options and other rights to purchase, 4,077,242, 5,211,668 and 4,665,293 shares of common stock, respectively, were not included in the computation of diluted loss per common share because doing so would have had an antidilutive effect.