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Note B - Summary of Significant Accounting Policies (Detail) - Sales (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 31, 2013 | Jan. 31, 2012 | Jan. 31, 2013 | Jan. 31, 2012
Sales | $ 106,215 | $ 93,957 | $ 302,706 | $ 284,409
Sales - Used Autos [Member] |  |  |  |
Sales | 94,966 | 82,589 | 268,539 | 250,865
Wholesales - Third Party [Member] |  |  |  |
Sales | 4,300 | 5,008 | 13,953 | 15,239
Service Contract Sales [Member] |  |  |  |
Sales | 3,661 | 3,500 | 10,730 | 10,039
Payment Protection Plan Revenue [Member] |  |  |  |
Sales | $ 3,288 | $ 2,860 | $ 9,484 | $ 8,266

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- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
Name: | us-gaap_SalesRevenueGoodsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration