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Net Income Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Reconciliation of Common Shares Used for Basic and Diluted Earnings Per Share

The following table provides a reconciliation of the common shares used for basic earnings per share and diluted earnings per share:


		Successor Ambac						Predecessor Ambac
		Two months ended June 30, 2013						One month ended April 30, 2013				Three months ended June 30, 2012
Weighted average number of common shares used for basic earnings per share			45,000,653						302,469,626				302,469,196
Effect of potential dilutive shares:
Warrants			1,575,064						—				—
Restricted stock units			—						109,593				—

Weighted average number of common shares and potential dilutive shares used for diluted earnings per share		$	46,575,717					$	302,579,219			$	302,469,196

Anti-dilutive shares excluded from the above reconciliation:
Warrants			—						—				—
Stock options			—						461,150				850,308
Restricted stock units			—						—				71,296


		Successor Ambac						Predecessor Ambac
		Two months ended June 30, 2013						Four months ended April 30, 2013				Six months ended June 30, 2012
Weighted average number of common shares used for basic earnings per share			45,000,653						302,469,544				302,467,762
Effect of potential dilutive shares:
Warrants			1,575,064						—				—
Restricted stock units			—						109,701				—

Weighted average number of common shares and potential dilutive shares used for diluted earnings per share		$	46,575,717					$	302,579,245			$	302,467,762

Anti-dilutive shares excluded from the above reconciliation:
Warrants			—						—				—
Stock options			—						475,550				868,990
Restricted stock units			—						—				72,060