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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Treasury Stock | Retained Earnings | Accumulated Other Comprehensive Loss | Stock Held in Trust | Deferred Compensation Liability
--- | --- | --- | --- | --- | --- | --- | --- | ---
Shares, Issued at Aug. 31, 2016 |  | 79,393 |  |  |  |  |  |
Beginning Balance at Aug. 31, 2016 | $ 520,950 | $ 15,879 | $ 114,980 | $ (617,731) | $ 1,259,645 | $ (251,823) | $ (2,646) | $ 2,646
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net loss | (66,213) |  |  |  | (66,213) |  |  |
Total other comprehensive income (loss), net of tax | 24,562 |  |  |  |  | 24,562 |  |
Company stock contribution to employee benefit plans and other (in shares) |  | 17 |  |  |  |  |  |
Company stock contribution to employee benefit plans and other | 893 | $ 3 | 890 |  |  |  |  |
Restricted stock awards, vesting and withhold to cover (in shares) |  | 397 |  |  |  |  |  |
Restricted stock awards issuance and vesting | 0 | $ 79 | (79) |  |  |  |  |
Cash dividend ($0.04 per share) | (2,390) |  |  |  | (2,390) |  |  |
Stock based compensation expense | 16,733 |  | 16,733 |  |  |  |  |
Proceeds from Stock Options Exercised | 7,762 |  |  |  |  |  |  |
Stock option exercises (in shares) |  | 374 |  |  |  |  |  |
Stock Issued During Period, Value, Stock Options Exercised | 7,762 | $ 75 | 7,687 |  |  |  |  |
Excess tax benefit (shortfall) on stock option exercises | (2,042) |  | (2,042) |  |  |  |  |
Stock issued to, acquired for and distributed from rabbi trust (in shares) |  | 19 |  |  |  |  |  |
Stock issued to, acquired for and distributed from rabbi trust | 284 | $ 4 | 280 |  |  |  | (50) | 50
Ending Balance at Aug. 31, 2017 | 500,539 | $ 16,040 | 138,449 | (617,731) | 1,191,042 | (227,261) | (2,696) | 2,696
Shares, Issued at Aug. 31, 2017 |  | 80,200 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net loss | (21,648) |  |  |  | (21,648) |  |  |
Total other comprehensive income (loss), net of tax | 53,016 |  |  |  |  | 53,016 |  |
Company stock contribution to employee benefit plans and other (in shares) |  | 20 |  |  |  |  |  |
Company stock contribution to employee benefit plans and other | 539 | $ 4 | 535 |  |  |  |  |
Restricted stock awards, vesting and withhold to cover (in shares) |  | 400 |  |  |  |  |  |
Restricted stock awards issuance and vesting | 0 | $ 80 | (80) |  |  |  |  |
Cash dividend ($0.04 per share) | (2,439) |  |  |  | (2,439) |  |  |
Stock based compensation expense | 14,457 |  | 14,457 |  |  |  |  |
Proceeds from Stock Options Exercised | 15,140 |  |  |  |  |  |  |
Stock option exercises (in shares) |  | 780 |  |  |  |  |  |
Stock Issued During Period, Value, Stock Options Exercised | 15,140 | $ 156 | 14,984 |  |  |  |  |
Adjustment to Additional Paid in Capital, Income Tax Effect from Net Settlement of Equity Awards | (1,281) |  | (1,281) |  |  |  |  |
Stock issued to, acquired for and distributed from rabbi trust (in shares) |  | 25 |  |  |  |  |  |
Stock issued to, acquired for and distributed from rabbi trust | 389 | $ 5 | 384 |  |  |  | 246 | (246)
Ending Balance at Aug. 31, 2018 | 558,712 | $ 16,285 | 167,448 | (617,731) | 1,166,955 | (174,245) | (2,450) | 2,450
Shares, Issued at Aug. 31, 2018 |  | 81,424 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net loss | (249,145) |  |  |  | (249,145) |  |  |
Total other comprehensive income (loss), net of tax | 2,573 |  |  |  |  | 2,573 |  |
Company stock contribution to employee benefit plans and other (in shares) |  | 20 |  |  |  |  |  |
Company stock contribution to employee benefit plans and other | 496 | $ 4 | 492 |  |  |  |  |
Restricted stock awards, vesting and withhold to cover (in shares) |  | 375 |  |  |  |  |  |
Restricted stock awards issuance and vesting | 0 | $ 75 | (75) |  |  |  |  |
Cash dividend ($0.04 per share) | (2,419) |  |  |  | (2,419) |  |  |
Treasury stock repurchases | (22,481) |  |  | (22,481) |  |  |  |
Stock based compensation expense | 13,318 |  | 13,318 |  |  |  |  |
Proceeds from Stock Options Exercised | 1,404 |  |  |  |  |  |  |
Stock option exercises (in shares) |  | 65 |  |  |  |  |  |
Stock Issued During Period, Value, Stock Options Exercised |  | $ 13 | 1,391 |  |  |  |  |
Adjustment to Additional Paid in Capital, Income Tax Effect from Net Settlement of Equity Awards | (1,872) |  | (1,872) |  |  |  |  |
Stock issued to, acquired for and distributed from rabbi trust (in shares) |  | 35 |  |  |  |  |  |
Stock issued to, acquired for and distributed from rabbi trust | 518 | $ 7 | 511 |  |  |  | (620) | 620
Ending Balance at Aug. 31, 2019 | 301,179 | $ 16,384 | $ 181,213 | $ (640,212) | 915,466 | $ (171,672) | $ (3,070) | $ 3,070
Shares, Issued at Aug. 31, 2019 |  | 81,919 |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets | $ 75 |  |  |  | $ 75 |  |  |

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