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Earnings (Loss) Per Share - Computation for Basic and Diluted Earnings (Loss) Per Share (Detail) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 28, 2015 | Nov. 30, 2014 | Aug. 31, 2014 | May 31, 2014 | Feb. 28, 2014 | Nov. 30, 2013 | Aug. 31, 2013 | May 31, 2013 | Feb. 28, 2015 | Feb. 28, 2014 | Feb. 28, 2013
Earnings Per Share [Abstract] |  |  |  |  |  |  |  |  |  |  |
Basic weighted average common shares outstanding |  |  |  |  |  |  |  |  | 25,864,352 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 26,125,348 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 26,035,571 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Effect of dilutive options |  |  |  |  |  |  |  |  |  | 20,977 us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants | 17,881 us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants
Diluted weighted average common shares outstanding |  |  |  |  |  |  |  |  | 25,864,352 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 26,146,325 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 26,053,452 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Per share amounts: |  |  |  |  |  |  |  |  |  |  |
Net earnings (loss) - basic | $ 0.34 us-gaap_EarningsPerShareBasic | $ (2.76)us-gaap_EarningsPerShareBasic | $ 0.39 us-gaap_EarningsPerShareBasic | $ 0.31 us-gaap_EarningsPerShareBasic | $ (0.55)us-gaap_EarningsPerShareBasic | $ 0.36 us-gaap_EarningsPerShareBasic | $ 0.38 us-gaap_EarningsPerShareBasic | $ 0.33 us-gaap_EarningsPerShareBasic | $ (1.72)us-gaap_EarningsPerShareBasic | $ 0.50 us-gaap_EarningsPerShareBasic | $ 0.95 us-gaap_EarningsPerShareBasic
Net earnings (loss) - diluted | $ 0.34 us-gaap_EarningsPerShareDiluted | $ (2.76)us-gaap_EarningsPerShareDiluted | $ 0.39 us-gaap_EarningsPerShareDiluted | $ 0.31 us-gaap_EarningsPerShareDiluted | $ (0.55)us-gaap_EarningsPerShareDiluted | $ 0.36 us-gaap_EarningsPerShareDiluted | $ 0.38 us-gaap_EarningsPerShareDiluted | $ 0.33 us-gaap_EarningsPerShareDiluted | $ (1.72)us-gaap_EarningsPerShareDiluted | $ 0.50 us-gaap_EarningsPerShareDiluted | $ 0.95 us-gaap_EarningsPerShareDiluted
Cash dividends | $ 0.175 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.175 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.175 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.175 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.175 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.175 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.175 us-gaap_CommonStockDividendsPerShareCashPaid |  | $ 0.70 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.53 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.88 us-gaap_CommonStockDividendsPerShareCashPaid

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.23) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 + Details
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 + Details
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Warrant -URI http://asc.fasb.org/extlink&oid=6528364 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 23 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1757-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Treasury Stock Method -URI http://asc.fasb.org/extlink&oid=6527216 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Call Option -URI http://asc.fasb.org/extlink&oid=6506649 + Details
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