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Stockholders' Equity (Details) (USD $) | 3 Months Ended | 6 Months Ended | 1 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Jan. 31, 2014 | Oct. 31, 2013 | Jan. 31, 2014 | Jan. 31, 2013 | Mar. 06, 2014 Subsequent | Jan. 31, 2014 Quarterly Dividend - First | Jan. 31, 2014 Quarterly Dividend - Second | Jan. 31, 2014 Dividend Declared Third Subsequent
Stock Repurchase Program |  |  |  |  |  |  |  |
Shares acquired |  |  | 935,992 | 397,798 |  |  |  |
Average price per share of shares repurchased on the open market |  |  | $ 31.10 | $ 26.34 |  |  |  |
Aggregate cost including transaction costs |  |  | $ 29,107,000 | $ 10,477,000 |  |  |  |
Stock Repurchase Program Authorization Date |  |  | Dec. 09, 2013 | Dec. 06, 2012 |  |  |  |
Maximum amount authorized by the Board of Directors for repurchases of the company's common stock |  |  | 100,000,000 | 50,000,000 |  |  |  |
Stock repurchase program, remaining authorized repurchase amount |  |  | $ 55,247,000 |  | $ 44,000,000 |  |  |
Dividends |  |  |  |  |  |  |  |
Targeted annual dividend per share | $ 1.20 | $ 1.10 |  |  |  |  |  |
Date declared |  |  | Dec. 09, 2013 |  |  | Oct. 03, 2013 | Dec. 09, 2013 | Mar. 06, 2014
Date of record |  |  | Jan. 17, 2014 |  |  |  |  | May 07, 2014
Date paid |  |  |  |  |  | Nov. 19, 2013 | Feb. 19, 2014 | May 30, 2014
Quarterly dividend payment amount per share |  |  |  |  |  | $ 0.275 | $ 0.30 | $ 0.30

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