XML 17 R37.htm IDEA: XBRL DOCUMENT v2.4.0.6

Fair Value Disclosures (Details Textuals)	6 Months Ended
	Sep. 30, 2012
Minimum
Financial Instruments Not Measured At Fair Value [Line Items]
Initial term of the indirect finance receivables	12 months
Initial term of the direct finance receivables	6 months
Maximum
Financial Instruments Not Measured At Fair Value [Line Items]
Initial term of the indirect finance receivables	72 months
Initial term of the direct finance receivables	48 months

X

- Details

Name:	nick_FinancialInstrumentsNotMeasuredAtFairValueLineItems
Namespace Prefix:	nick_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

This item represents initial term of direct finance receivables.

+ References

No definition available.

+ Details

Name:	nick_InitialTermsOfDirectFinanceReceivables
Namespace Prefix:	nick_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

This item represents initial term of indirect finance receivables.

+ References

No definition available.

+ Details

Name:	nick_InitialTermsOfIndirectFinanceReceivables
Namespace Prefix:	nick_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration