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Shareholders' Equity (Narrative) (Details) (USD $) | 0 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Oct. 28, 2011 | Dec. 31, 2012 | Jan. 31, 2012 | Oct. 31, 2010 | Oct. 31, 2013 | Jul. 31, 2013 | Apr. 30, 2013 | Jan. 31, 2013 | Oct. 31, 2012 | Jul. 31, 2012 | Apr. 30, 2012 | Jan. 31, 2012 | Oct. 31, 2013 vote | Oct. 31, 2012 | Oct. 31, 2011 | Sep. 20, 2012
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized to be repurchased (shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 320,000
Purchase and retire percentage of shares in common stock outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.90%
Outstanding common stock remaining to be repurchased (shares) |  |  |  |  | 123,500 |  |  |  |  |  |  |  | 123,500 |  |  |
Dividend declared, rights per share | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividend declared, right, no par value (usd per share) | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock, no par value (usd per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum percentage of stock owner in stockholder protection rights agreement |  |  |  |  |  |  |  |  |  |  |  |  | 15.00% |  |  |
Preferred stock dividend, par value (usd per share) |  |  |  |  | 0 |  |  |  |  |  |  |  | 0 |  |  |
Preferred shares, exercise price (usd per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ 25 |  |  |
Preferred shares, number of votes |  |  |  |  |  |  |  |  |  |  |  |  | 1,000 |  |  |
Dividend rate, percentage above common stock |  |  |  |  |  |  |  |  |  |  |  |  | 1000.00% |  |  |
Preferred shares, rights expiration date |  |  |  |  |  |  |  |  |  |  |  |  | Nov. 02, 2021 |  |  |
Preferred shares, rights redemption price (usd per share) |  |  |  |  | $ 0.0001 |  |  |  |  |  |  |  | $ 0.0001 |  |  |
Preferred shares reserved for issuance upon exercise of rights (shares) |  |  |  |  | 100,000 |  |  |  |  |  |  |  | 100,000 |  |  |
Cash dividends declared per common share (usd per share) |  | $ 0.02 | $ 0.015 | $ 0.01 | $ 0.02 | $ 0.02 | $ 0.02 | $ 0.02 | $ 0.015 | $ 0.015 | $ 0.015 | $ 0.015 | $ 0.08 | $ 0.06 | $ 0.04 |
Series A Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred shares per right (shares) |  |  |  |  |  |  |  |  |  |  |  |  | 0.001 |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase period |  |  |  |  |  |  |  |  |  |  |  |  | 12 months |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase period |  |  |  |  |  |  |  |  |  |  |  |  | 24 months |  |  |

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