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Statements of Consolidated Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Retained Earnings | Treasury Shares-at Cost | Accumulated Other Comprehensive Income (Loss) | Parent [Member] | Stock Options and Stock Appreciation Rights [ Member] | Stock Options and Stock Appreciation Rights [ Member] Additional Paid-in Capital | Stock Options and Stock Appreciation Rights [ Member] Treasury Shares-at Cost | Stock Options and Stock Appreciation Rights [ Member] Parent [Member] | Performance Shares [Member] Additional Paid-in Capital | Performance Shares [Member] Treasury Shares-at Cost | Performance Shares [Member] Parent [Member] | Restricted Stock Units (RSUs) [Member] Additional Paid-in Capital | Restricted Stock Units (RSUs) [Member] Treasury Shares-at Cost | Restricted Stock Units (RSUs) [Member] Parent [Member]
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Beginning balance, shares at Jun. 30, 2014 |  | 41,563 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance at Jun. 30, 2014 |  | $ 10,000 | $ 156,999 | $ 896,776 | $ (261,852) | $ (1,615) | $ 800,308 |  |  |  |  |  |  |  |  |  |
Net income | $ 115,484 |  |  | 115,484 |  |  | 115,484 |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) | (58,556) |  |  |  |  | (58,556) | (58,556) |  |  |  |  |  |  |  |  |  |
Cash dividends - $1.04, $1.10 and $1.14 per share for 2015, 2016 and 2017 respectively |  |  |  | (42,663) |  |  | (42,663) |  |  |  |  |  |  |  |  |  |
Purchases of common stock for treasury, shares |  | (1,740) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchases of common stock for treasury |  |  |  |  | (76,515) |  | (76,515) |  |  |  |  |  |  |  |  |  |
Treasury shares issued for: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise of stock appreciation rights and options, shares |  | 34 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional Paid in Capital, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units |  |  |  |  |  |  |  |  | $ 552 |  |  | $ (425) |  |  | $ (1,312) |  |
Exercise of stock appreciation rights and options |  |  |  |  |  |  |  |  |  | $ 415 |  |  |  |  |  |  |
Performance share awards, shares |  | 12 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Performance share awards |  |  |  |  |  |  |  |  |  |  |  |  | $ 52 |  |  |  |
Restricted stock units, shares |  | 36 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 76 |
Total Shareholders' Equity, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units |  |  |  |  |  |  |  |  |  |  | $ 967 |  |  | $ (373) |  |  | $ (1,236)
Deferred compensation plans, shares |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred compensation plans |  |  | 24 |  | 21 |  | 45 |  |  |  |  |  |  |  |  |  |
Compensation expense -- stock appreciation rights and options |  |  | 2,851 |  |  |  | 2,851 |  | 1,610 |  | 1,610 |  |  |  |  |  |
Other, shares |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other |  |  | (227) | (49) | (318) |  | (594) |  |  |  |  |  |  |  |  |  |
Ending balance, shares at Jun. 30, 2015 |  | 39,905 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance at Jun. 30, 2015 |  | $ 10,000 | 160,072 | 969,548 | (338,121) | (60,171) | 741,328 |  |  |  |  |  |  |  |  |  |
Net income | 29,577 |  |  | 29,577 |  |  | 29,577 |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) | $ (25,375) |  |  |  |  | (25,375) | (25,375) |  |  |  |  |  |  |  |  |  |
Cash dividends - $1.04, $1.10 and $1.14 per share for 2015, 2016 and 2017 respectively |  |  |  | (54,266) |  |  | (54,266) |  |  |  |  |  |  |  |  |  |
Purchases of common stock for treasury, shares |  | (951) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchases of common stock for treasury |  |  |  |  | (37,465) |  | (37,465) |  |  |  |  |  |  |  |  |  |
Treasury shares issued for: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise of stock appreciation rights and options, shares |  | 64 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional Paid in Capital, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units |  |  |  |  |  |  |  |  | (391) |  |  | (308) |  |  | (530) |  |
Exercise of stock appreciation rights and options |  |  |  |  |  |  |  |  |  | 1,000 |  |  |  |  |  |  |
Performance share awards, shares |  | 8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Performance share awards |  |  |  |  |  |  |  |  |  |  |  |  | 116 |  |  |  |
Restricted stock units, shares |  | 15 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 232 |
Total Shareholders' Equity, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units |  |  |  |  |  |  |  |  |  |  | 609 |  |  | (192) |  |  | (298)
Compensation expense -- stock appreciation rights and options |  |  | 2,524 |  |  |  | 2,524 |  | 1,543 |  | 1,543 |  |  |  |  |  |
Other, shares |  | 16 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other |  |  | (381) | (38) | 350 |  | (69) |  |  |  |  |  |  |  |  |  |
Ending balance, shares at Jun. 30, 2016 | 39,057 | 39,057 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance at Jun. 30, 2016 | $ 657,916 | $ 10,000 | 162,529 | 944,821 | (373,888) | (85,546) | 657,916 |  |  |  |  |  |  |  |  |  |
Net income | 133,910 |  |  | 133,910 |  |  | 133,910 |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) | $ 3,844 |  |  |  |  | 3,844 | 3,844 |  |  |  |  |  |  |  |  |  |
Cash dividends - $1.04, $1.10 and $1.14 per share for 2015, 2016 and 2017 respectively |  |  |  | (45,005) |  |  | (45,005) |  |  |  |  |  |  |  |  |  |
Purchases of common stock for treasury, shares |  | (163) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchases of common stock for treasury |  |  |  |  | (8,242) |  | (8,242) |  |  |  |  |  |  |  |  |  |
Treasury shares issued for: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise of stock appreciation rights and options, shares |  | 111 |  |  |  |  |  | 343 |  |  |  |  |  |  |  |  |
Additional Paid in Capital, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units |  |  |  |  |  |  |  |  | (2,218) |  |  | $ (360) |  |  | $ (624) |  |
Exercise of stock appreciation rights and options |  |  |  |  |  |  |  |  |  | $ 105 |  |  |  |  |  |  |
Performance share awards, shares |  | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Performance share awards |  |  |  |  |  |  |  |  |  |  |  |  | $ 126 |  |  |  |
Restricted stock units, shares |  | 15 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 227 |
Total Shareholders' Equity, Exercise of stock appreciation rights and options, Performance share awards, Restricted stock units |  |  |  |  |  |  |  |  |  |  | (2,113) |  |  | $ (234) |  |  | $ (397)
Compensation expense -- stock appreciation rights and options |  |  | 3,629 |  |  |  | 3,629 |  | $ 1,891 |  | $ 1,891 |  |  |  |  |  |
Other, shares |  | 11 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other |  |  | (192) | 25 | 224 |  | 57 |  |  |  |  |  |  |  |  |  |
Ending balance, shares at Jun. 30, 2017 | 39,041 | 39,041 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance at Jun. 30, 2017 | $ 745,256 | $ 10,000 | $ 164,655 | $ 1,033,751 | $ (381,448) | $ (81,702) | $ 745,256 |  |  |  |  |  |  |  |  |  |

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