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Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total stockholders equity | Preferred Stock [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Total Accumulated Other Comprehensive (Loss) Earnings [Member] | Foreign Currency Translation Adjustments [Member] | Unrealized Derivative Gains (Losses) [Member] | Minimum Retirement Benefit Liability Adjustments [Member] | Deferred Compensation in Equity [Member] | Retained Earnings [Member] | Treasury Stock at Cost [Member] | Treasury Stock Held for Deferred Compensaton [Member] | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balances at Sep. 30, 2016 | $ 1,212,595 |  | $ 106 | $ 141,570 | $ (65,705) | $ (25,971) | $ 179 | $ (39,913) | $ 5,089 | $ 1,649,506 | $ (512,882) | $ (5,089) |
Balance, Preferred Stock, shares at Sep. 30, 2016 |  | 0 |  |  |  |  |  |  |  |  |  |  |
Balance, Common Stock, shares at Sep. 30, 2016 |  |  | 72,960 |  |  |  |  |  |  |  |  |  |
Balance, Treasury Stock, shares at Sep. 30, 2016 |  |  |  |  |  |  |  |  |  |  | (11,374) |  |
Balance, Treasury stock held for deferred compensation, Shares at Sep. 30, 2016 |  |  |  |  |  |  |  |  |  |  |  | (157) |
Net earnings | 84,653 |  |  |  |  |  |  |  |  | 84,653 |  |  | $ 84,653
Other comprehensive income (loss), net of tax | (7,025) |  |  |  | (7,025) | (8,495) | (22) | 1,492 |  |  |  |  |
Cash dividends paid | (14,415) |  |  |  |  |  |  |  |  | (14,415) |  |  |
Purchases of treasury stock | (63,255) |  |  |  |  |  |  |  |  |  | $ (63,255) |  |
Purchases of treasury stock, shares |  |  |  |  |  |  |  |  |  |  | (915) |  |
Sales of treasury stock | 12,695 |  |  | (2,015) |  |  |  |  |  |  | $ 14,710 |  |
Sales of treasury stock, shares |  |  |  |  |  |  |  |  |  |  | 376 |  |
Common shares issued from treasury stock to settle employee liabilities | 1,767 |  |  | 740 |  |  |  |  | 1,767 |  | $ 1,027 | $ (1,767) | 1,767
Common shares issued from treasury stock to settle employee liabilities, shares |  |  |  |  |  |  |  |  |  |  | 26 | (26) |
Common shares issued from treasury stock for benefit plans | 14,014 |  |  | 6,501 |  |  |  |  |  |  | $ 7,513 |  | $ 14,014
Common shares issued from treasury stock for benefit plans, shares |  |  |  |  |  |  |  |  |  |  | 199 |  | 199
Stock-based compensation | 13,763 |  |  | 13,763 |  |  |  |  |  |  |  |  |
Distribution of stock from deferred compensation plan |  |  |  |  |  |  |  |  | (7) |  |  | $ 7 |
Balances at Mar. 31, 2017 | 1,254,792 |  | $ 106 | 160,559 | (72,730) | (34,466) | 157 | (38,421) | 7,060 | 1,719,744 | $ (552,887) | $ (7,060) |
Balance, Preferred Stock, shares at Mar. 31, 2017 |  | 0 |  |  |  |  |  |  |  |  |  |  |
Balance, Common Stock, shares at Mar. 31, 2017 |  |  | 72,960 |  |  |  |  |  |  |  |  |  |
Balance, Treasury Stock, shares at Mar. 31, 2017 |  |  |  |  |  |  |  |  |  |  | (11,688) |  |
Balance, Treasury stock held for deferred compensation, Shares at Mar. 31, 2017 |  |  |  |  |  |  |  |  |  |  |  | (186) |
Balances at Sep. 30, 2017 | 1,371,383 |  | $ 106 | 163,836 | (53,186) | (27,280) | 135 | (26,041) | 7,135 | 1,820,268 | $ (559,641) | $ (7,135) | $ 1,371,383
Balance, Preferred Stock, shares at Sep. 30, 2017 |  | 0 |  |  |  |  |  |  |  |  |  |  | 0
Balance, Common Stock, shares at Sep. 30, 2017 |  |  | 72,960 |  |  |  |  |  |  |  |  |  | 72,960
Balance, Treasury Stock, shares at Sep. 30, 2017 |  |  |  |  |  |  |  |  |  |  | (11,739) |  | (11,739)
Balance, Treasury stock held for deferred compensation, Shares at Sep. 30, 2017 |  |  |  |  |  |  |  |  |  |  |  | (186) | (186)
Net earnings | 56,749 |  |  |  |  |  |  |  |  | 56,749 |  |  | $ 56,749
Other comprehensive income (loss), net of tax | 12,465 |  |  |  | 12,465 | 12,413 | (23) | 75 |  |  |  |  |
Cash dividends paid | (16,422) |  |  |  |  |  |  |  |  | (16,422) |  |  |
Sales of treasury stock | 3,560 |  |  | 171 |  |  |  |  |  |  | $ 3,389 |  |
Sales of treasury stock, shares |  |  |  |  |  |  |  |  |  |  | 97 |  |
Common shares issued from treasury stock to settle employee liabilities |  |  |  |  |  |  |  |  |  |  |  |  | 0
Common shares issued from treasury stock for benefit plans | 14,741 |  |  | 7,157 |  |  |  |  |  |  | $ 7,584 |  | $ 14,741
Common shares issued from treasury stock for benefit plans, shares |  |  |  |  |  |  |  |  |  |  | 202 |  | 202
Stock-based compensation | 14,434 |  |  | 14,434 |  |  |  |  |  |  |  |  |
Purchases of stock by deferred compensation plan |  |  |  |  |  |  |  |  | 1,093 |  |  | $ (1,093) |
Purchases of stock by deferred compensation plan, shares |  |  |  |  |  |  |  |  |  |  |  | (14) |
Distribution of stock from deferred compensation plan |  |  |  |  |  |  |  |  | (6) |  |  | $ 6 |
Balances at Mar. 31, 2018 | $ 1,456,910 |  | $ 106 | $ 185,598 | $ (40,721) | $ (14,867) | $ 112 | $ (25,966) | $ 8,222 | $ 1,860,595 | $ (548,668) | $ (8,222) | $ 1,456,910
Balance, Preferred Stock, shares at Mar. 31, 2018 |  | 0 |  |  |  |  |  |  |  |  |  |  | 0
Balance, Common Stock, shares at Mar. 31, 2018 |  |  | 72,960 |  |  |  |  |  |  |  |  |  | 72,960
Balance, Treasury Stock, shares at Mar. 31, 2018 |  |  |  |  |  |  |  |  |  |  | (11,440) |  | (11,440)
Balance, Treasury stock held for deferred compensation, Shares at Mar. 31, 2018 |  |  |  |  |  |  |  |  |  |  |  | (200) | (200)

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