Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Supplemental Equity and Accumulated Other Comprehensive Income (Loss) - Consolidated Changes in Equity (Details)

Note 8 - Supplemental Equity and Accumulated Other Comprehensive Income (Loss) - Consolidated Changes in Equity (Details) - USD ($)	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Balance (in shares)	37,934,040
Balance	$ 1,165,589,000	$ 1,079,061,000
Cumulative effect adjustments due to adoption of new accounting standards and other	(879,000)	594,000
Net earnings	14,398,000	17,403,000
Other comprehensive income (loss)	$ (8,106,000)	$ (1,136,000)
Common stock issued for exercise of options (in shares)	93,596	166,577
Common stock issued for exercise of options	$ 7,855,000	$ 15,611,000
Common stock issued for restricted stock awards	(1,926,000)	(2,405,000)
Cash dividends	(12,169,000)	(12,066,000)
Stock-based compensation expense	8,267,000	11,327,000
Common stock issued to employee stock purchase plan	1,096,000	842,000
Employee stock purchase plan expense	$ 99,000	238,000
Balance (in shares)	38,084,292
Balance	$ 1,174,224,000	$ 1,109,469,000
Common Stock [Member]
Balance (in shares)	37,934,000	37,608,000
Balance	$ 379,000	$ 376,000
Common stock issued for exercise of options (in shares)	94,000	166,000
Common stock issued for exercise of options	$ 1,000	$ 2,000
Common stock issued for restricted stock awards (in shares)	50,000	24,000
Common stock issued for restricted stock awards	$ 0	$ 0
Common stock issued to employee stock purchase plan (in shares)	6,000	5,000
Common stock issued to employee stock purchase plan	$ 0	$ 0
Balance (in shares)	38,084,000	37,803,000
Balance	$ 381,000	$ 378,000
Additional Paid-in Capital [Member]
Balance	316,797,000	246,568,000
Common stock issued for exercise of options	7,854,000	15,609,000
Common stock issued for restricted stock awards	(0)
Stock-based compensation expense	8,267,000	11,327,000
Common stock issued to employee stock purchase plan	1,096,000	842,000
Employee stock purchase plan expense	99,000	238,000
Balance	334,112,000	274,584,000
Retained Earnings [Member]
Balance	931,934,000	876,931,000
Cumulative effect adjustments due to adoption of new accounting standards and other	(879,000)	25,276,000
Net earnings	14,398,000	17,403,000
Common stock issued for restricted stock awards	(1,926,000)	(2,405,000)
Cash dividends	(12,169,000)	(12,066,000)
Balance	931,358,000	905,139,000
AOCI Attributable to Parent [Member]
Balance	(83,521,000)	(44,814,000)
Cumulative effect adjustments due to adoption of new accounting standards and other		(24,682,000)
Other comprehensive income (loss)	(8,106,000)	(1,136,000)
Balance	$ (91,627,000)	$ (70,632,000)