Basis of Presentation and Significant Accounting Policies (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
	Jun. 11, 2014	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	Apr. 30, 2013
Fresh-Start Adjustment [Line Items]
Deferred Amounts and Junior Deferred Amounts Accrued Interest Rate	5.10%									5.10%		5.10%
Business Acquisition, Percentage of Voting Interests Acquired													50.00%
Goodwill [Roll Forward]
Currency Translation, Weighted Average Risk Free Discount Rate		2.60%				2.70%				2.60%	2.70%
Financial Guarantee Insurance Contracts, Premium Received over Contract Period, Premium Receivable, Weighted Average Collection Period										9 years	9 years 2 months 12 days
Successor [Member]
Goodwill [Roll Forward]
Beginning balance					$ 0				$ 514,511	$ 0	$ 514,511	$ 514,511
Impairment loss		$ 0	$ 0	$ 0	$ 0	$ 0	$ 514,511	$ 0	$ 0	0	(514,511)	0
Ending balance		$ 0				$ 0				0	0	514,511
Financial Guarantee Insurance Contracts, Accelerated Premium Revenue, Amount										52,416	137,400	29,964
Reorganization items										$ 0	$ 0	$ 211