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CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Mar. 31, 2011
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract] |  |  |  |  |
Sales of product and services | $ 936,228 |  | $ 784,951 |  | $ 672,303
Financing revenue | 38,384 |  | 30,899 |  | 35,367
Fee and other income | 8,500 |  | 9,731 |  | 10,720
Patent settlement income | 0 |  | 0 |  | 125
TOTAL REVENUES | 983,112 |  | 825,581 |  | 718,515
COSTS AND EXPENSES |  |  |  |  |
Cost of sales, product and services | 767,447 |  | 645,558 |  | 551,860
Direct lease costs | 10,892 |  | 8,508 |  | 9,212
Total cost of sales | 778,339 |  | 654,066 |  | 561,072
Professional and other fees | 13,098 |  | 11,744 |  | 15,383
Salaries and benefits | 110,963 |  | 98,268 |  | 84,247
General and administrative expenses | 20,099 |  | 20,499 |  | 14,681
Interest and financing costs | 1,868 |  | 1,430 |  | 2,564
Total expenses | 146,028 |  | 131,941 |  | 116,875
TOTAL COSTS AND EXPENSES | 924,367 |  | 786,007 |  | 677,947
EARNINGS BEFORE PROVISION FOR INCOME TAXES | 58,745 |  | 39,574 |  | 40,568
PROVISION FOR INCOME TAXES | 23,915 |  | 16,207 |  | 16,841
NET EARNINGS | $ 34,830 |  | $ 23,367 |  | $ 23,727
NET EARNINGS PER COMMON SHARE-BASIC (In dollars per share) | $ 4.37 | [1] | $ 2.82 | [1] | $ 2.83
NET EARNINGS PER COMMON SHARE-DILUTED (In dollars per share) | $ 4.32 | [1] | $ 2.79 | [1] | $ 2.78
WEIGHTED AVERAGE SHARES OUTSTANDING-BASIC (In shares) | 7,809,938 |  | 8,002,191 |  | 8,200,577
WEIGHTED AVERAGE SHARES OUTSTANDING-DILUTED (In shares) | 7,902,871 |  | 8,095,192 |  | 8,352,921
[1] | Basic and diluted earnings per share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted earnings per share.

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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 07-4 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 171 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
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