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Financial Guarantee Insurance Contracts - Summary of Gross Premium Receivable Roll-Forward (Direct and Assumed Contracts) (Detail) - Successor [Member] - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Dec. 31, 2015 | Sep. 30, 2015 | Dec. 31, 2014
Insurance [Line Items] |  |  |  |  |
Percentage Premiums Receivable Related To Transactions With Non Investment Grade Internal Ratings | 25.00% |  | 27.00% |  |
Financial Guarantee Insurance Contracts, Premium Receivable [Roll Forward] |  |  |  |  |
Beginning premium receivable | $ 831,575 | $ 1,000,607 | $ 1,000,607 |  |
Premium receipts | (21,377) | (27,453) |  |  |
Adjustments for changes in expected and contractual cash flows | (35,029) | (5,918) |  |  |
Accretion of premium receivable discount | 5,123 | 6,282 |  |  |
Uncollectable premiums | 5,126 | 698 |  |  |
Other adjustments (including foreign exchange) | (3,340) | (22,217) |  |  |
Ending premium receivable | $ 782,078 | $ 951,999 | $ 831,575 |  |
Percentage Of Premiums Receivable Related To Non Investment Grade Rmbs Transactions | 8.00% |  | 8.00% |  |
Premiums Receivable, Allowance for Doubtful Accounts |  |  |  | $ 10,114 | $ 15,240
Premiums Past Due On Non Investment Grade Obligation | $ 500 |  |  |  |

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- Definition Percentage of financial guarantee premiums receivable related to RMBS insured transactions with non-investment grade internal ratings. + References No definition available. + Details
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- Definition Percentage of financial guarantee premiums receivable related to insured transactions with non-investment grade internal ratings. + References No definition available. + Details
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- Definition Past due premiums on policies insuring internally rated non-investment grade obligations. + References No definition available. + Details
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- Definition Amount of increase (decrease) in the allowance for doubtful accounts. + References No definition available. + Details
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- Definition Amount of the premium receivable for financial guarantee insurance contracts reported in the statement of financial position. This element primarily would consist of those financial guarantee insurance contracts which premiums are to be collected over the contract period, but may, on occasion, include premiums which are to be collected in full at inception, but which straddle a financial reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 310 -Section 50 -Paragraph 3 -Subparagraph (c)(1),(5) -URI http://asc.fasb.org/extlink&oid=6933075&loc=SL5748726-161290 + Details
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- Definition Amount of premium payments received during the period for premiums receivable on financial guarantee insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 310 -Section 50 -Paragraph 3 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6933075&loc=SL5748726-161290 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition This element represents the accretion of the discount for premiums receivable on financial guarantee insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 310 -Section 50 -Paragraph 3 -Subparagraph (c)(4)(iii) -URI http://asc.fasb.org/extlink&oid=6933075&loc=SL5748726-161290 + Details
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- Definition This element represents adjustments to the premium receivable related to financial guarantee insurance contracts due to changes in the period of the contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 310 -Section 50 -Paragraph 3 -Subparagraph (c)(4)(i) -URI http://asc.fasb.org/extlink&oid=6933075&loc=SL5748726-161290 + Details
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- Definition This element represents other adjustments to premiums receivable on financial guarantee insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 310 -Section 50 -Paragraph 3 -Subparagraph (c)(4)(iv) -URI http://asc.fasb.org/extlink&oid=6933075&loc=SL5748726-161290 + Details
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- Definition The carrying value as of the balance sheet date of the estimated valuation allowance to reduce gross premiums receivable to net realizable value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5074-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.5) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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