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Transactions With Related Parties (Narrative) (Details) (USD $) In Millions, unless otherwise specified | Sep. 30, 2013 | Dec. 31, 2012
--- | --- | ---
Sandhill [Member] |  |
Related Party Transaction [Line Items] |  |
Due from related parties | $ 0.3 | $ 0.3
Sandhill Group Llc [Member] |  |
Related Party Transaction [Line Items] |  |
Percentage of interest held | 50.00% |

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