XML 101 R74.htm IDEA: XBRL DOCUMENT v2.4.0.6

Derivative Instruments - Summary of Net Par Outstanding for CDS Contracts (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Ambac Rating
Notional outstanding	$ 12,274,885	$ 14,166,612
AAA Rating [Member]
Ambac Rating
Notional outstanding	742,699	1,211,598
AA Rating [Member]
Ambac Rating
Notional outstanding	6,408,302	7,442,106
A Rating [Member]
Ambac Rating
Notional outstanding	4,148,910	4,704,759
BBB Rating [Member]
Ambac Rating
Notional outstanding	683,528	518,142
Below Investment Grade Rating [Member]
Ambac Rating
Notional outstanding	291,446	290,007
CLOs [Member]
Ambac Rating
Notional outstanding	7,067,409	8,228,577
CLOs [Member] | AAA Rating [Member]
Ambac Rating
Notional outstanding	217,833	297,741
CLOs [Member] | AA Rating [Member]
Ambac Rating
Notional outstanding	5,144,553	6,193,522
CLOs [Member] | A Rating [Member]
Ambac Rating
Notional outstanding	1,705,023	1,737,314
Other [Member]
Ambac Rating
Notional outstanding	5,207,476	5,938,035
Other [Member] | AAA Rating [Member]
Ambac Rating
Notional outstanding	524,866	913,857
Other [Member] | AA Rating [Member]
Ambac Rating
Notional outstanding	1,263,749	1,248,584
Other [Member] | A Rating [Member]
Ambac Rating
Notional outstanding	2,443,887	2,967,445
Other [Member] | BBB Rating [Member]
Ambac Rating
Notional outstanding	683,528	518,142
Other [Member] | Below Investment Grade Rating [Member]
Ambac Rating
Notional outstanding	$ 291,446	$ 290,007

X

- Definition

Aggregate notional amount of credit risk derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_NotionalAmountOfDerivativesAdditionalCategoriesOfDerivativesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration