Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Supplemental Equity and Accumulated Other Comprehensive Income (Loss) - Consolidated Changes in Equity (Details)

Note 7 - Supplemental Equity and Accumulated Other Comprehensive Income (Loss) - Consolidated Changes in Equity (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017
Balance (in shares)		37,607,500			37,607,500
Balance	$ 1,109,469	$ 1,079,061	$ 960,082	$ 949,627	$ 1,079,061	$ 949,627
Cumulative effect adjustments due to adoption of new accounting standards		98			98
Net earnings	17,556	17,403	48,847	15,863	34,958	64,710
Other comprehensive loss	(12,379)	(1,136)	(7,058)	(824)	$ (13,515)	$ (7,882)
Share repurchases	(15,404)
Surrender and retirement of stock to exercise options				0
Common stock issued for exercise of options (in shares)					189,627	70,069
Common stock issued for exercise of options	2,408	15,611	2,893	3,051
Common stock issued for restricted stock awards		(1,909)		(227)
Cash dividends	(12,086)	(12,066)	(11,988)	(11,958)
Stock-based compensation expense	6,784	11,327	4,985	3,718
Common stock issued to employee stock purchase plan		842		755
Employee stock purchase plan expense	$ 77	238	59	77
Balance (in shares)	37,734,646				37,734,646
Balance	$ 1,096,425	$ 1,109,469	$ 997,819	$ 960,082	$ 1,096,425	$ 997,819
Common Stock [Member]
Balance (in shares)	37,803,000	37,608,000	37,409,000	37,356,000	37,608,000	37,356,000
Balance	$ 378	$ 376	$ 374	$ 374	$ 376	$ 374
Cumulative effect adjustments due to adoption of new accounting standards
Net earnings
Other comprehensive loss
Share repurchases	(1)
Surrender and retirement of stock to exercise options
Common stock issued for exercise of options (in shares)	24,000	166,000	38,000	33,000
Common stock issued for exercise of options	$ 0	$ 2	$ 1	$ 0
Common stock issued for restricted stock awards (in shares)	3,000	24,000	22,000	13,000
Common stock issued for restricted stock awards	$ 0	$ 0		$ 0
Cash dividends
Stock-based compensation expense
Common stock issued to employee stock purchase plan (in shares)	0	5,000		7,000
Common stock issued to employee stock purchase plan	$ 0			$ 0
Employee stock purchase plan expense
Share repurchases (in shares)	(95,000)
Balance (in shares)	37,735,000	37,803,000	37,470,000	37,409,000	37,735,000	37,470,000
Balance	$ 377	$ 378	$ 375	$ 374	$ 377	$ 375
Additional Paid-in Capital [Member]
Balance	274,584	246,568	206,762	199,161	246,568	199,161
Cumulative effect adjustments due to adoption of new accounting standards
Net earnings
Other comprehensive loss
Share repurchases
Surrender and retirement of stock to exercise options
Common stock issued for exercise of options	2,408	15,609	2,892	3,051
Common stock issued for restricted stock awards
Cash dividends
Stock-based compensation expense	6,784	11,327	4,985	3,718
Common stock issued to employee stock purchase plan		842		755
Employee stock purchase plan expense	77	238	59	77
Balance	283,854	274,584	214,697	206,762	283,854	214,697
Retained Earnings [Member]
Balance	905,139	876,931	802,705	799,027	876,931	799,027
Cumulative effect adjustments due to adoption of new accounting standards		24,780			24,780
Net earnings	17,556	17,403	48,847	15,863
Other comprehensive loss
Share repurchases	(15,404)
Surrender and retirement of stock to exercise options
Common stock issued for exercise of options
Common stock issued for restricted stock awards	0	(1,909)		(227)
Cash dividends	(12,086)	(12,066)	(11,988)	(11,958)
Stock-based compensation expense
Common stock issued to employee stock purchase plan
Employee stock purchase plan expense
Balance	895,205	905,139	839,564	802,705	895,205	839,564
AOCI Attributable to Parent [Member]
Balance	(70,632)	(44,814)	(49,759)	(48,935)	(44,814)	(48,935)
Cumulative effect adjustments due to adoption of new accounting standards		(24,682)			(24,682)
Net earnings
Other comprehensive loss	(12,379)	(1,136)	(7,058)	(824)
Share repurchases
Surrender and retirement of stock to exercise options
Common stock issued for exercise of options
Common stock issued for restricted stock awards
Cash dividends
Stock-based compensation expense
Common stock issued to employee stock purchase plan
Employee stock purchase plan expense
Balance	$ (83,011)	$ (70,632)	$ (56,817)	$ (49,759)	$ (83,011)	$ (56,817)