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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)

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