Net Income Per Common Share Net Loss per Common Share (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 6 Months Ended | |||||
|---|---|---|---|---|---|---|---|
Apr. 13, 2016 |
Mar. 29, 2016 |
Mar. 09, 2016 |
Jan. 31, 2016 |
Jan. 31, 2015 |
Jan. 31, 2016 |
Jan. 31, 2015 |
|
| Anti-dilutive securities (in shares) | 19,000 | 8,000 | 10,000 | 4,000 | |||
| Cash dividends declared per share | $ 0.6225 | $ 0.4150 | $ 1.2450 | $ 0.8300 | |||
| Payments of Dividends | $ 22,600 | $ 15,100 | $ 45,221 | $ 30,141 | |||
| Scenario, Forecast [Member] | |||||||
| Cash dividends declared per share | $ 0.8100 | ||||||
| Dividends Payable, Date to be Paid | Apr. 13, 2016 | ||||||
| Dividends Payable, Date of Record | Mar. 29, 2016 | ||||||