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Revenue Recognition (Details)	3 Months Ended
	Jun. 30, 2012
Deferred Revenue Arrangement [Line Items]
Maximum term of suspension of interest on finance receivables	60 days
Nicholas Data Services, Inc
Deferred Revenue Arrangement [Line Items]
Percentage of revenues	1.00%

X

- Definition

Percentage of consolidated revenue generated from a single external customer that accounts for 10 percent or less of an entity's revenues.

+ References

No definition available.

+ Details

Name:	nick_EntityWideConsolidatedRevenueMajorCustomerPercentage
Namespace Prefix:	nick_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Description of the maximum term of suspension of the interest on finance receivables.

+ References

No definition available.

+ Details

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

X

- Details

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