Net Income Per Share (Tables)

6 Months Ended

Jun. 30, 2014

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 to the diluted shares used for diluted earnings per share:

	Successor Ambac		Predecessor Ambac
	Period from April 1 through June 30, 2014	Period from May 1 through June 30, 2013	Period from April 1 through April 30, 2013
Weighted average number of common shares used for basic earnings per share	45,091,983	45,000,653	302,469,626
Effect of potential dilutive shares:
Warrants	—	1,575,064	—
Stock options	—	—	—
Restricted stock units	—	—	109,593
Performance stock units	—	—	—
Weighted average number of common shares and potential dilutive shares used for diluted earnings per share	45,091,983	46,575,717	302,579,219
Anti-dilutive shares excluded from the above reconciliation:
Warrants	5,040,775	—	—
Stock options	66,668	—	461,150
Restricted stock units	74,341	—	—
Performance stock units	—	—	—

	Successor Ambac		Predecessor Ambac
	Period from January 1 through June 30, 2014	Period from May 1 through June 30, 2013	Period from January 1 through April 30, 2013
Weighted average number of common shares used for basic earnings per share	45,067,539	45,000,653	302,469,544
Effect of potential dilutive shares:
Warrants	—	1,575,064	—
Stock options	—	—	—
Restricted stock units	—	—	109,701
Performance stock units	—	—	—
Weighted average number of common shares and potential dilutive shares used for diluted earnings per share	45,067,539	46,575,717	302,579,245
Anti-dilutive shares excluded from the above reconciliation:
Warrants	5,040,784	—	—
Stock options	66,668	—	475,550
Restricted stock units	94,131	—	—
Performance stock units	—	—	—