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Finance Receivables - Reconciliation of changes in allowance for credit losses on direct loans (Details 3) (USD $)	3 Months Ended								12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision for credit losses	$ 4,181,286	$ 4,183,035	$ 3,973,104	$ 2,641,791	$ 3,542,077	$ 3,484,811	$ 3,261,721	$ 3,103,266	$ 14,979,216	$ 13,391,875	$ 12,367,593
Finance receivables | Direct Loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of year				467,917				492,184	467,917	492,184	378,418
Provision for credit losses									285,375	139,493	182,062
Losses absorbed									(192,156)	(190,871)	(93,041)
Recoveries									29,142	27,111	24,745
Balance at end of year	$ 590,278				$ 467,917				$ 590,278	$ 467,917	$ 492,184

X

- Definition

This element represents the amount of allowance for credit losses absorbed.

+ References

No definition available.

+ Details

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X

- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524

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X

- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(4)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524

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X

- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 11

-Article 9



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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-Section 50

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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