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Financial Guarantee Insurance Contracts - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended | 3 Months Ended |  | 3 Months Ended |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2014 Successor Ambac [Member] | Dec. 31, 2013 Successor Ambac [Member] | Mar. 31, 2014 Successor Ambac [Member] Insurance Intangible Asset [Member] | Mar. 31, 2013 Predecessor Ambac [Member] | Dec. 31, 2012 Predecessor Ambac [Member] | Mar. 31, 2014 Maximum [Member] | Mar. 31, 2014 Loss Reserves [Member] | Dec. 31, 2013 Loss Reserves [Member]
Insurance [Line Items] |  |  |  |  |  |  |  |  |  |
Weighted average risk-free interest rate | 2.90% | 3.00% |  |  |  |  |  |  |  |
Weighted average period of future premiums | 9 years 8 months 12 days | 9 years 7 months 6 days |  |  |  |  |  |  |  |
Transactions with non-investment grade internal ratings | 45.00% | 44.00% |  |  |  |  |  |  |  |
Non-investment grade RMBS on total premiums receivable | 6.00% | 7.00% |  |  |  |  |  |  |  |
Percentage of student loan transactions on total premium receivables | 7.00% | 7.00% |  |  |  |  |  |  |  |
Percentage related to asset-backed transaction | 17.00% | 17.00% |  |  |  |  |  |  |  |
Uncollectable premium receivables |  |  | $ 16,336 | $ 15,262 |  |  |  |  |  |
Past due premiums on policies insuring non-investment grade obligations amount |  |  |  |  |  |  |  | 500 |  |
Accelerated premium revenue for retired obligations |  |  | 25,114 |  |  | 29,360 |  |  |  |
Reinsurance recoveries of losses included in losses and loss expenses |  |  | (10,559) |  |  | 3,881 |  |  |  |
Weighted average risk-free rate used to discount loss reserves |  |  |  |  |  |  |  |  | 2.90% | 3.20%
Losses and loss expense reserves ceded to reinsurers |  |  | 111,303 | 122,357 |  | 148,749 | 147,409 |  |  |
Subrogation recoveries | 2,224,295 | 2,206,598 |  |  |  |  |  |  |  |
Subrogation recoveries, net of reinsurance | 2,201,983 | 2,183,652 |  |  |  |  |  |  |  |
Intangible amortization expense |  |  | 31,714 |  | 31,714 | 0 |  |  |  |
Insurance intangible asset | 1,570,070 | 1,597,965 |  |  |  |  |  |  |  |
Accumulated amortization on insurance intangible asset | $ 132,688 | $ 100,767 |  |  |  |  |  |  |  |

X
- Definition Accumulated Amortization on Intangible Asset + References No definition available. + Details
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Balance Type: | credit
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- Definition This element represents the reduction to gross claim liability for subrogation on insured RMBS financial obligations with credit deterioration. + References No definition available. + Details
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- Definition This element represents the reduction to gross claim liability for subrogation on insured RMBS financial obligations with credit deterioration, net of reinsurance. + References No definition available. + Details
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- Details
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- Definition The known and estimated amount recoverable as of the balance sheet date from reinsurers for claims expected to be paid or incurred by the ceding insurer. + References No definition available. + Details
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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 Student Loan insured transactions with non-investment grade internal ratings. + References No definition available. + Details
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- Definition Percentage Premiums Receivable Related To Certain Asset Backed Transactions With Non Investment Grade Internal Rating + 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 The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition This element represents the amount of premium revenue on financial guarantee insurance contracts recognized during the period that was accelerated for revenue recognition purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6933581&loc=SL5749298-161291 + Details
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- Definition This element represents the weighted average risk free rate used to discount the claim liability related to financial guarantee insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 9 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6933314&loc=SL5749324-161292 + Details
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- Definition Weighted average period over which premium receivable for financial guarantee insurance contracts is collected where premium is received over the contract period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (a)(5) -URI http://asc.fasb.org/extlink&oid=6933075&loc=SL5748726-161290 + Details
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- Definition This element represents the weighted average risk free rate used to discount the premiums expected to be collected for financial guarantee insurance contracts where the premium is to be received over the contract 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 (a)(4) -URI http://asc.fasb.org/extlink&oid=6933075&loc=SL5748726-161290 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + 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=28368275&loc=d3e5074-111524 Reference 2: 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 7 Reference 4: 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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 + Details
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- Definition Amount of reduction of provision for policy benefits and costs incurred for policies ceded. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6480758&loc=d3e6811-158387 + Details
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