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Financial Guarantee Insurance Contracts - Summary of Information Related to Policies Currently Included in Ambac's Loss Reserves or Subrogation Recoverable (Detail) (Successor Ambac [Member], USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2014 Policies | Dec. 31, 2013 Policies
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items] |  |
Number of policies | 364 | 339
Remaining weighted-average contract period (in years) | 14 years | 14 years
Gross insured contractual payments outstanding: |  |
Principal | $ 22,010,268 | $ 22,206,789
Interest | 8,294,958 | 8,397,133
Total | 30,305,226 | 30,603,922
Gross undiscounted claim liability | 10,746,955 | 11,276,259
Discount, gross claim liability | (2,065,190) | (2,452,448)
Gross claim liability before all subrogation and before reinsurance | 8,681,765 | 8,823,811
Less: |  |
Gross RMBS subrogation | (2,235,231) | (2,215,849)
Discount, RMBS subrogation | 10,936 | 9,251
Discounted RMBS subrogation, before reinsurance | (2,224,295) | (2,206,598)
Less: |  |
Gross other subrogation | (835,939) | (846,699)
Discount, other subrogation | 87,723 | 91,313
Discounted other subrogation, before reinsurance | (748,216) | (755,386)
Gross claim liability, net of all subrogation and discounts, before reinsurance | 5,709,254 | 5,861,827
Less: Unearned premium reserves | (495,006) | (502,984)
Plus: Loss adjustment expenses reserves | 99,685 | 111,391
Claim liability reported on Balance Sheet, before reinsurance | 5,313,933 | 5,470,234
Reinsurance recoverable reported on Balance Sheet | 111,442 | 121,249
I/SL [Member] |  |
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items] |  |
Number of policies | 27 | 18
Remaining weighted-average contract period (in years) | 12 years | 13 years
Gross insured contractual payments outstanding: |  |
Principal | 760,825 | 834,708
Interest | 415,417 | 506,903
Total | 1,176,242 | 1,341,611
Gross undiscounted claim liability | 5,408 | 7,447
Discount, gross claim liability | (747) | (1,225)
Gross claim liability before all subrogation and before reinsurance | 4,661 | 6,222
Less: |  |
Gross claim liability, net of all subrogation and discounts, before reinsurance | 4,661 | 6,222
Less: Unearned premium reserves | (3,195) | (4,060)
Claim liability reported on Balance Sheet, before reinsurance | 1,466 | 2,162
Reinsurance recoverable reported on Balance Sheet | 55 | 146
IA [Member] |  |
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items] |  |
Number of policies | 29 | 23
Remaining weighted-average contract period (in years) | 13 years | 19 years
Gross insured contractual payments outstanding: |  |
Principal | 964,929 | 1,125,284
Interest | 485,353 | 871,751
Total | 1,450,282 | 1,997,035
Gross undiscounted claim liability | 17,697 | 54,398
Discount, gross claim liability | (1,456) | (6,726)
Gross claim liability before all subrogation and before reinsurance | 16,241 | 47,672
Less: |  |
Gross claim liability, net of all subrogation and discounts, before reinsurance | 16,241 | 47,672
Less: Unearned premium reserves | (9,270) | (22,901)
Plus: Loss adjustment expenses reserves | 11 | 11
Claim liability reported on Balance Sheet, before reinsurance | 6,982 | 24,782
Reinsurance recoverable reported on Balance Sheet | 872 | 2,271
II [Member] |  |
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items] |  |
Number of policies | 66 | 52
Remaining weighted-average contract period (in years) | 16 years | 17 years
Gross insured contractual payments outstanding: |  |
Principal | 4,057,893 | 3,464,420
Interest | 2,765,425 | 2,130,271
Total | 6,823,318 | 5,594,691
Gross undiscounted claim liability | 245,484 | 221,321
Discount, gross claim liability | (29,272) | (32,630)
Gross claim liability before all subrogation and before reinsurance | 216,212 | 188,691
Less: |  |
Gross other subrogation | (22,213) | (20,367)
Discount, other subrogation | 9,694 | 9,522
Discounted other subrogation, before reinsurance | (12,519) | (10,845)
Gross claim liability, net of all subrogation and discounts, before reinsurance | 203,693 | 177,846
Less: Unearned premium reserves | (108,203) | (95,550)
Plus: Loss adjustment expenses reserves | 2,275 | 2,257
Claim liability reported on Balance Sheet, before reinsurance | 97,765 | 84,553
Reinsurance recoverable reported on Balance Sheet | 2,795 | 2,273
III [Member] |  |
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items] |  |
Number of policies | 70 | 76
Remaining weighted-average contract period (in years) | 19 years | 19 years
Gross insured contractual payments outstanding: |  |
Principal | 5,232,627 | 5,597,387
Interest | 2,168,384 | 2,331,222
Total | 7,401,011 | 7,928,609
Gross undiscounted claim liability | 2,616,809 | 3,029,891
Discount, gross claim liability | (1,006,627) | (1,299,032)
Gross claim liability before all subrogation and before reinsurance | 1,610,182 | 1,730,859
Less: |  |
Gross RMBS subrogation | (2,513) | (4,516)
Discount, RMBS subrogation | 9 | 15
Discounted RMBS subrogation, before reinsurance | (2,504) | (4,501)
Less: |  |
Gross other subrogation | (117,755) | (116,145)
Discount, other subrogation | 33,024 | 36,125
Discounted other subrogation, before reinsurance | (84,731) | (80,020)
Gross claim liability, net of all subrogation and discounts, before reinsurance | 1,522,947 | 1,646,338
Less: Unearned premium reserves | (275,241) | (280,245)
Plus: Loss adjustment expenses reserves | 1,462 | 1,658
Claim liability reported on Balance Sheet, before reinsurance | 1,249,168 | 1,367,751
Reinsurance recoverable reported on Balance Sheet | 110,712 | 119,795
IV [Member] |  |
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items] |  |
Number of policies | 171 | 169
Remaining weighted-average contract period (in years) | 11 years | 11 years
Gross insured contractual payments outstanding: |  |
Principal | 10,993,947 | 11,184,943
Interest | 2,460,360 | 2,556,968
Total | 13,454,307 | 13,741,911
Gross undiscounted claim liability | 7,861,495 | 7,963,137
Discount, gross claim liability | (1,027,085) | (1,112,829)
Gross claim liability before all subrogation and before reinsurance | 6,834,410 | 6,850,308
Less: |  |
Gross RMBS subrogation | (2,232,718) | (2,211,333)
Discount, RMBS subrogation | 10,927 | 9,236
Discounted RMBS subrogation, before reinsurance | (2,221,791) | (2,202,097)
Less: |  |
Gross other subrogation | (695,971) | (710,187)
Discount, other subrogation | 45,005 | 45,666
Discounted other subrogation, before reinsurance | (650,966) | (664,521)
Gross claim liability, net of all subrogation and discounts, before reinsurance | 3,961,653 | 3,983,690
Less: Unearned premium reserves | (99,097) | (100,228)
Plus: Loss adjustment expenses reserves | 95,937 | 107,465
Claim liability reported on Balance Sheet, before reinsurance | 3,958,493 | 3,990,927
Reinsurance recoverable reported on Balance Sheet | (2,992) | (3,236)
V [Member] |  |
Schedule of Insured Financial Obligations with Credit Deterioration [Line Items] |  |
Number of policies | 1 | 1
Remaining weighted-average contract period (in years) | 6 years | 6 years
Gross insured contractual payments outstanding: |  |
Principal | 47 | 47
Interest | 19 | 18
Total | 66 | 65
Gross undiscounted claim liability | 62 | 65
Discount, gross claim liability | (3) | (6)
Gross claim liability before all subrogation and before reinsurance | 59 | 59
Less: |  |
Gross claim liability, net of all subrogation and discounts, before reinsurance | 59 | 59
Claim liability reported on Balance Sheet, before reinsurance | $ 59 | $ 59

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- Definition This element represents the discounting on the gross claim liability for financial guarantee insurance contracts presented in the context of each surveillance grouping or category used by management to monitor and track potential deterioration in the credit worthiness of the insured party's ability to meet its financial obligations related to the contracts underlying financial guarantee insurance contracts the entity has issued. + References No definition available. + Details
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- Definition This element represents the gross undiscounted claim liability for financial guarantee insurance contracts presented in the context of each surveillance grouping or category used by management to monitor and track potential deterioration in the credit worthiness of the insured party's ability to meet its financial obligations related to the contracts underlying financial guarantee insurance contracts the entity has issued. + References No definition available. + Details
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- Definition This element represents the amount of loss adjustment expense reserves represent the costs estimated to be incurred in the settlement of unpaid claims related to financial guarantee insurance contracts and presented in the schedule of insured financial obligations with credit deterioration in the context of each surveillance grouping or category used by management to monitor and track potential deterioration in the credit worthiness of the insured party's ability to meet its financial obligations related to the contracts underlying financial guarantee insurance contracts the entity has issued. + References No definition available. + Details
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- Definition This element represents the discount on the gross subrogation on insured financial obligations with credit deterioration, excluding the discount on the gross subrogation on insured RMBS financial obligations with credit deterioration. + References No definition available. + Details
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- Definition This element represents the discounting on 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 financial obligations with credit deterioration, excluding 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. + References No definition available. + Details
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- Definition This element represents the reduction to gross undiscounted claim liability for gross undiscounted subrogation on insured financial obligations with credit deterioration, excluding 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 undiscounted claim liability for gross undiscounted subrogation on insured RMBS financial obligations with credit deterioration. + References No definition available. + Details
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- Definition Remaining weighted average contract period of financial guarantee insurance contracts, 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 40 -Section 50 -Paragraph 9 -Subparagraph (a)(5)(ii) -URI http://asc.fasb.org/extlink&oid=6933314&loc=SL5749324-161292 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 55 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=6933462&loc=SL5751133-161288 + Details
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- Definition This element represents the gross claim liability for financial guarantee insurance contracts presented in the context of each surveillance grouping or category used by management to monitor and track potential deterioration in the credit worthiness of the insured party's ability to meet its financial obligations related to the contracts underlying financial guarantee insurance contracts the entity has issued. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 55 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=6933462&loc=SL5751133-161288 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 9 -Subparagraph (a)(5)(iv) -URI http://asc.fasb.org/extlink&oid=6933314&loc=SL5749324-161292 + Details
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- Definition This element represents the amount of insured contractual payments outstanding on the underlying insured obligations for financial guarantee insurance contracts presented in the context of each surveillance grouping or category used by management to monitor and track potential deterioration in the credit worthiness of the insured party's ability to meet its financial obligations related to the contracts underlying financial guarantee insurance contracts the entity has issued. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 55 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=6933462&loc=SL5751133-161288 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 9 -Subparagraph (a)(5)(iii) -URI http://asc.fasb.org/extlink&oid=6933314&loc=SL5749324-161292 + Details
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- Definition This element represents the amount of insured contractual payments outstanding attributable to interest accrued on the underlying insured obligations for financial guarantee insurance contracts presented in the context of each surveillance grouping or category used by management to monitor and track potential deterioration in the credit worthiness of the insured party's ability to meet its financial obligations related to the contracts underlying financial guarantee insurance contracts the entity has issued. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 55 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=6933462&loc=SL5751133-161288 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 9 -Subparagraph (a)(5)(iii) -URI http://asc.fasb.org/extlink&oid=6933314&loc=SL5749324-161292 + Details
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- Definition This element represents the amount of insured contractual payments outstanding attributable to the principal of the underlying insured obligations for financial guarantee insurance contracts presented in the context of each surveillance grouping or category used by management to monitor and track potential deterioration in the credit worthiness of the insured party's ability to meet its financial obligations related to the contracts underlying financial guarantee insurance contracts the entity has issued. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 55 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=6933462&loc=SL5751133-161288 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 9 -Subparagraph (a)(5)(iii) -URI http://asc.fasb.org/extlink&oid=6933314&loc=SL5749324-161292 + Details
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- Definition This element represents the net claim liability related to financial guarantee insurance contracts presented in the context of each surveillance grouping or category used by management to monitor and track potential deterioration in the credit worthiness of the insured party's ability to meet its financial obligations related to the contracts underlying financial guarantee insurance contracts the entity has issued. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 55 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=6933462&loc=SL5751133-161288 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 9 -Subparagraph (a)(5)(vii) -URI http://asc.fasb.org/extlink&oid=6933314&loc=SL5749324-161292 + Details
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- Definition This element represents the number of issued and outstanding contracts for each surveillance grouping or category used by management to monitor and track potential deterioration in the credit worthiness of the insured party's ability to meet its financial obligations related to the contracts underlying financial guarantee insurance contracts the entity has issued. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 55 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=6933462&loc=SL5751133-161288 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 9 -Subparagraph (a)(5)(i) -URI http://asc.fasb.org/extlink&oid=6933314&loc=SL5749324-161292 + Details
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- Definition This element represents the claim liability, reported on or included in the statement of financial position, related to financial guarantee insurance contracts and presented in the schedule of insured financial obligations with credit deterioration in the context of each surveillance grouping or category used by management to monitor and track potential deterioration in the credit worthiness of the insured party's ability to meet its financial obligations related to the contracts underlying financial guarantee insurance contracts the entity has issued. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 55 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=6933462&loc=SL5751140-161288 + Details
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- Definition This element represents the amount of reinsurance recoverable, reported on or included in the statement of financial position, related to financial guarantee insurance contracts and presented in the schedule of insured financial obligations with credit deterioration in the context of each surveillance grouping or category used by management to monitor and track potential deterioration in the credit worthiness of the insured party's ability to meet its financial obligations related to the contracts underlying financial guarantee insurance contracts the entity has issued. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 55 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=6933462&loc=SL5751133-161288 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 9 -Subparagraph (a)(5)(viii) -URI http://asc.fasb.org/extlink&oid=6933314&loc=SL5749324-161292 + Details
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- Definition This element represents the amount of unearned premium revenue, reported on or included in the statement of financial position, related to financial guarantee insurance contracts and presented in the schedule of insured financial obligations with credit deterioration in the context of each surveillance grouping or category used by management to monitor and track potential deterioration in the credit worthiness of the insured party's ability to meet its financial obligations related to the contracts underlying financial guarantee insurance contracts the entity has issued. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 55 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=6933462&loc=SL5751133-161288 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 9 -Subparagraph (a)(5)(ix) -URI http://asc.fasb.org/extlink&oid=6933314&loc=SL5749324-161292 + Details
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