Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended								12 Months Ended
	Mar. 31, 2013 offices	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2013 segments offices	Mar. 31, 2012	Mar. 31, 2011
Nature of Operations [Abstract]
Number of offices operated in the United States of America	1,084								1,084
Number of offices operated in Mexico	119								119
Business Segments [Abstract]
Number of reportable segments									1
Total assets	$ 809,324,965				$ 735,003,099				$ 809,324,965	$ 735,003,099
Total revenues	161,844,000	149,640,000	139,398,000	132,836,000	148,921,000	135,946,000	132,139,000	123,156,000	583,717,713	540,161,682	491,445,103
Cash and Cash Equivalents [Abstract]
Periods of maturity of highly liquid investments (in months)									3 months
Loans and Interest Income [Abstract]
Direct consumer loans, Maximum	4,000				4,000				4,000	4,000
Consumer direct cash loan terms, Maximum (in months)									44 months	44 months
Percentage of present value of new loan terms to remaining cash flows under original loan, Minimum (in hundredths)	10.00%								10.00%
Allowance for loan losses [Abstract]
Principal loans more than ninety days past due included in loan loss reserves (in hundredths)	100.00%								100.00%
General reserve percentage									4.25%
Provision for loan, lease, and other losses									5.00%
Average loan life									8 months
Impaired loans [Abstract]
Number of days past due for loans to be classified as impaired, Minimum (in days)									90 days
Net investment in loans deemed uncollectible charged-off (in hundredths)	100.00%								100.00%
Bankrupt accounts that had not been charged off	5,900,000								5,900,000
Accounts past due, reserved (in hundredths)	100.00%								100.00%
ParaData [Member]
Business Segments [Abstract]
Number of finance companies provided data processing systems									105
Total assets	900,000				1,000,000				900,000	1,000,000
Percentage of consolidated assets, Maximum (in hundredths)									1.00%	1.00%
Percentage of consolidated revenues, Maximum (in hundredths)									1.00%	1.00%	1.00%
Total revenues									$ 2,100,000	$ 2,300,000	$ 1,900,000
Minimum [Member]
Impaired loans [Abstract]
Financing Receivable, Historial Loss Ratio, Percentage									13.30%
Maximum [Member]
Impaired loans [Abstract]
Financing Receivable, Historial Loss Ratio, Percentage									16.70%