Consolidated Stockholders' Equity Statement [Table Text Block] |
| | | | | | | | Retained | | | | | | | | | | | | | | | | | | | | | | | | | | | | Balances at June 30, 2018 | | | | | | $ | | | | $ | | | | $ | | | | $ | | | | $ | | | Cumulative effect adjustments due to adoption of new accounting standards | | | | | | | | | | | | | | | 24,780 | | | | (24,682 | ) | | | 98 | | Net earnings | | | | | | | | | | | | | | | 17,403 | | | | | | | | 17,403 | | Other comprehensive loss | | | | | | | | | | | | | | | | | | | (1,136 | ) | | | (1,136 | ) | Share repurchases | | | | | | | | | | | | | | | | | | | | | | | - | | Surrender and retirement of stock to exercise options | | | | | | | | | | | | | | | | | | | | | | | - | | Common stock issued for exercise of options | | | 166 | | | | 2 | | | | 15,609 | | | | | | | | | | | | 15,611 | | Common stock issued for restricted stock awards | | | 24 | | | | 0 | | | | | | | | (1,909 | ) | | | | | | | (1,909 | ) | Cash dividends | | | | | | | | | | | | | | | (12,066 | ) | | | | | | | (12,066 | ) | Stock-based compensation expense | | | | | | | | | | | 11,327 | | | | | | | | | | | | 11,327 | | Common stock issued to employee stock purchase plan | | | 5 | | | | - | | | | 842 | | | | | | | | | | | | 842 | | Employee stock purchase plan expense | | | | | | | | | | | 238 | | | | | | | | | | | | 238 | | Balances at September 30, 2018 | | | | | | $ | | | | $ | | | | $ | | | | $ | | | | $ | | | Net earnings | | | | | | | | | | | | | | | 17,556 | | | | | | | | 17,556 | | Other comprehensive loss | | | | | | | | | | | | | | | | | | | (12,379 | ) | | | (12,379 | ) | Share repurchases | | | (95 | ) | | | (1 | ) | | | | | | | (15,404 | ) | | | | | | | (15,404 | ) | Surrender and retirement of stock to exercise options | | | | | | | | | | | | | | | | | | | | | | | - | | Common stock issued for exercise of options | | | 24 | | | | 0 | | | | 2,408 | | | | | | | | | | | | 2,408 | | Common stock issued for restricted stock awards | | | 3 | | | | 0 | | | | | | | | 0 | | | | | | | | - | | Cash dividends | | | | | | | | | | | | | | | (12,086 | ) | | | | | | | (12,086 | ) | Stock-based compensation expense | | | | | | | | | | | 6,784 | | | | | | | | | | | | 6,784 | | Common stock issued to employee stock purchase plan | | | 0 | | | | 0 | | | | | | | | | | | | | | | | - | | Employee stock purchase plan expense | | | | | | | | | | | 77 | | | | | | | | | | | | 77 | | Balances at December 31, 2018 | | | | | | $ | | | | $ | | | | $ | | | | $ | | | | $ | | |
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Accumulated Other Comprehensive | | | | | | | |
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| | Balances at June 30, 2017 | | | | | | $ | | | | $ | | | | $ | | | | $ | | | | $ | | | Net earnings | | | | | | | | | | | | | | | 15,863 | | | | | | | | 15,863 | | Other comprehensive loss | | | | | | | | | | | | | | | | | | | (824 | ) | | | (824 | ) | Surrender and retirement of stock to exercise options | | | | | | | | | | | | | | | | | | | | | | | 0 | | Common stock issued for exercise of options | | | 33 | | | | 0 | | | | 3,051 | | | | | | | | | | | | 3,051 | | Common stock issued for restricted stock awards | | | 13 | | | | 0 | | | | | | | | (227 | ) | | | | | | | (227 | ) | Cash dividends | | | | | | | | | | | | | | | (11,958 | ) | | | | | | | (11,958 | ) | Stock-based compensation expense | | | | | | | | | | | 3,718 | | | | | | | | | | | | 3,718 | | Common stock issued to employee stock purchase plan | | | 7 | | | | 0 | | | | 755 | | | | | | | | | | | | 755 | | Employee stock purchase plan expense | | | | | | | | | | | 77 | | | | | | | | | | | | 77 | | Balances at September 30, 2017 | | | | | | $ | | | | $ | | | | $ | | | | $ | | | | $ | | | Net earnings | | | | | | | | | | | | | | | 48,847 | | | | | | | | 48,847 | | Other comprehensive loss | | | | | | | | | | | | | | | | | | | (7,058 | ) | | | (7,058 | ) | Surrender and retirement of stock to exercise options | | | | | | | | | | | | | | | | | | | | | | | - | | Common stock issued for exercise of options | | | 38 | | | | 1 | | | | 2,892 | | | | | | | | | | | | 2,893 | | Common stock issued for restricted stock awards | | | 22 | | | | - | | | | | | | | - | | | | | | | | - | | Cash dividends | | | | | | | | | | | | | | | (11,988 | ) | | | | | | | (11,988 | ) | Stock-based compensation expense | | | | | | | | | | | 4,985 | | | | | | | | | | | | 4,985 | | Common stock issued to employee stock purchase plan | | | - | | | | | | | | - | | | | | | | | | | | | - | | Employee stock purchase plan expense | | | | | | | | | | | 59 | | | | | | | | | | | | 59 | | Balances at December 31, 2017 | | | | | | $ | | | | $ | | | | $ | | | | $ | | | | $ | | |
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Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instruments | | | | | Beginning balance as of June 30, 2018 | | $ | 24,682 | | | $ | (69,496 | ) | | $ | - | | | $ | (44,814 | ) | Cumulative effect adjustment for adoption for ASU 2018-02 (1)
| | | 2,371 | | | | - | | | | - | | | | 2,371 | | Cumulative effect adjustment for adoption for ASU 2016-01 (1)
| | | (27,053 | ) | | | - | | | | - | | | | (27,053 | ) | Other comprehensive income (loss), net of tax benefit of $1,216 on derivative instruments (2)
| | | - | | | | | ) | | | (3,915 | ) | | | (13,515 | ) | Ending balance as of December 31, 2018 | | $ | - | | | $ | (79,096 | ) | | $ | (3,915 | ) | | $ | (83,011 | ) |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Beginning balance as of June 30, 2017 | | $ | 18,989 | | | $ | (67,924 | ) | | $ | - | | | $ | (48,935 | ) | Other comprehensive income (loss), net of tax benefit of $4,576 before reclassifications | | | (16,374 | ) | | | 8,492 | | | | - | | | | (7,882 | ) | Ending balance as of December 31.2017 | | $ | 2,615 | | | | (59,432 | ) | | $ | - | | | $ | (56,817 | ) |
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