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Note 13 - Stock-based Compensation and Purchase Plans (Tables)

12 Months Ended

Jun. 30, 2016

Notes Tables

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

		Restricted Stock Awards
		Number of Shares				Aggregate Intrinsic Value
Outstanding, June 30, 2015			105,079			$	8,398,964
Granted			48,984
Exercised / vested			(42,580	)		$	1,069,817
Canceled			(6,958	)
Outstanding, June 30, 2016			104,525			$	8,636,901

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

		2016				2015				2014
Risk-free interest rates			1.10	%			0.88	%			0.70	%
Expected life of option grants (in years)			3				3				3
Expected volatility of underlying stock			26.6	%			32.0	%			38.9	%
Expected quarterly dividends (per share)		$	0.12			$	0.10			$	0.08

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

		Annual Component												Performance Stock Units
		Number of Shares				Weighted Average Exercise Price				Aggregate Intrinsic Value				Number of Shares				Aggregate Intrinsic Value
Non-vested, June 30, 2015			43,549			$	41.70			$	794,828				28,450			$	1,873,626
Granted			12,383				58.35								34,124
Vested			(19,899	)			31.50				880,209				(341	)		$	18,577
Forfeited			(5,436	)			50.58								(7,497	)
Non-vested, June 30, 2016			30,597			$	52.62			$	286,195				54,736			$	3,926,057

X

- 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

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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

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

+ References

No definition available.

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