Name:	exsl_FairValueAssumptionsHighestExpectedVolatilityRate
Namespace Prefix:	exsl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Agreed upon high price for the exchange of the underlying asset.

No definition available.

Name:	exsl_FairValueAssumptionsHighExercisePrice
Namespace Prefix:	exsl_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

High penalty interest rate assumption used in valuing an instrument.

No definition available.

Name:	exsl_FairValueAssumptionsHighPenaltyRiskFreeInterestRate
Namespace Prefix:	exsl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Potential high risk-free interest rate assumption used in valuing an instrument.

No definition available.

Name:	exsl_FairValueAssumptionsHighRiskFreeInterestRate
Namespace Prefix:	exsl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price the lowest range.

No definition available.

Name:	exsl_FairValueAssumptionsLowestExpectedVolatilityRate
Namespace Prefix:	exsl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Agreed upon low price for the exchange of the underlying asset.

No definition available.

Name:	exsl_FairValueAssumptionsLowExercisePrice
Namespace Prefix:	exsl_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

Lower penalty interest rate assumption used in valuing an instrument.

No definition available.

Name:	exsl_FairValueAssumptionsLowPenaltyRiskFreeInterestRate
Namespace Prefix:	exsl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Risk-free low interest rate assumption used in valuing an instrument.

No definition available.

Name:	exsl_FairValueAssumptionsLowRiskFreeInterestRate
Namespace Prefix:	exsl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Potential monthly risk-free interest rate assumption used in valuing an instrument.

No definition available.

Name:	exsl_FairValueValueAssumptionsMonthlyInterestinFreeInterestRate
Namespace Prefix:	exsl_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (a),(c),(d),(e)

-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959

Name:	us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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

Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as a liability.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959