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Finance Receivables - Selected information on entire portfolio of Company (Details 1) - Contract	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Contract Portfolio
Accounts Notes And Loans Receivable [Line Items]
Average APR	22.63%	22.38%
Average discount	7.65%	7.44%
Average term (months)	52 months	54 months
Number of active contracts	28,631	32,069
Direct Loan Portfolio
Accounts Notes And Loans Receivable [Line Items]
Average APR	26.24%	25.16%
Average term (months)	26 months	28 months
Number of active contracts	2,763	2,498

X

- Definition

Represents number of active contracts.

+ References

No definition available.

+ Details

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X

- Definition

Represents weighted average discount rate on the entire portfolio.

+ References

No definition available.

+ Details

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Namespace Prefix:	nick_
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X

- Definition

Represents weighted average percent rate on the entire portfolio.

+ References

No definition available.

+ Details

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X

- Definition

Represents weighted average term on the entire portfolio.

+ References

No definition available.

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Details

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X

- Details

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