Basis of Presentation and Significant Accounting Policies Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	May 01, 2013	Apr. 30, 2013
Finite-Lived Intangible Assets [Line Items]
Common Stock Voting Restrictions											10.00%
Common Stock, Par or Stated Value Per Share													$ 0.01
Entity Incorporation, Date of Incorporation									Apr. 29, 1991
Preferred stock, shares authorized													20,000,000
Preferred Stock, Par or Stated Value Per Share													$ 0.01
Common stock, shares issued													45,000,000
Junior surplus note of Ambac Assurance Segregated Account												$ 350,000
Common Stock Transfer Restrictions											5.00%
Common Stock Additional Transfer Restrictions											5.00%
Minimum [Member] | Furniture and Fixtures [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life									3 years
Maximum [Member] | Furniture and Fixtures [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life									5 years
Successor [Member]
Finite-Lived Intangible Assets [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification									$ 0
Goodwill, Impairment Loss	$ 0	$ 0	$ 0	$ 0	$ 0	$ (514,511)	$ 0	$ 0	$ 0	$ 514,511	$ 0
Common Stock, Par or Stated Value Per Share	$ 0.01				$ 0.01				$ 0.01	$ 0.01		$ 0.01
Preferred stock, shares authorized	20,000,000				20,000,000				20,000,000	20,000,000
Preferred Stock, Par or Stated Value Per Share	$ 0.01				$ 0.01				$ 0.01	$ 0.01
Common stock, shares issued	45,194,954				45,044,222				45,194,954	45,044,222		45,000,000
Warrant Exercised During Period Shares									136	740	949
Retained Earnings [Member] | Successor [Member]
Finite-Lived Intangible Assets [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification									$ 6,442