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Note 13 - Stock-Based Compensation and Purchase Plans (Tables) | 12 Months Ended
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Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] |
|  | Restricted Stock Awards |
|  | Number |  |  | Aggregate |
|  | of |  |  | Intrinsic |
|  | Shares |  |  | Value |
Outstanding, June 30, 2013 |  |  | 172,490 |  |  | $ | 9,098,848 |
Granted |  |  | 62,698 |  |  |  |  |
Exercised / vested |  |  | (88,826 | ) |  |  | 4,932,618 |
Canceled |  |  | (2,267 | ) |  |  |  |
Outstanding, June 30, 2014 |  |  | 144,095 |  |  | $ | 10,732,196 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2014 |  |  | 2013 |  |  | 2012 |
Risk-free interest rates |  |  | 0.70 | % |  |  | 0.25 | % |  |  | 0.25 | %
Expected life of option grants (in years) |  |  | 3 |  |  |  | 3 |  |  |  | 3 |
Expected volatility of underlying stock |  |  | 38.9 | % |  |  | 47.4 | % |  |  | 63.2 | %
Expected quarterly dividends (per share) |  | $ | 0.08 |  |  | $ | 0.07 |  |  | $ | 0.06 |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Annual Component |  |  | Performance Stock Units |
|  |  |  |  |  | Weighted |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Number |  |  | Average |  |  | Aggregate |  |  | Number |  |  | Aggregate |
|  | of |  |  | Exercise |  |  | Intrinsic |  |  | of |  |  | Intrinsic |
|  | Shares |  |  | Price |  |  | Value |  |  | Shares |  |  | Value |
Non-vested, June 30, 2013 |  |  | 105,967 |  |  | $ | 23.68 |  |  | $ | 1,683,260 |  |  |  | 41,003 |  |  | $ | 2,162,926 |
Granted |  |  | 15,608 |  |  |  | 39.56 |  |  |  |  |  |  |  | 87,220 |  |  |  |  |
Vested |  |  | (68,504 | ) |  |  | 22.49 |  |  |  | 2,308,140 |  |  |  | (58,584 | ) |  |  | 2,386,361 |
Forfeited |  |  | (639 | ) |  |  | 28.78 |  |  |  |  |  |  |  | (29,273 | ) |  |  |  |
Non-vested, June 30, 2014 |  |  | 52,432 |  |  | $ | 29.91 |  |  | $ | 1,360,566 |  |  |  | 40,366 |  |  | $ | 2,156,759 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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