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Subsequent Events (Details) (Grupo Finmart [Member], USD $) In Millions, unless otherwise specified |  | 0 Months Ended
--- | --- | ---
Mar. 31, 2013 | Apr. 02, 2013 Subsequent Event [Member]
Subsequent Event [Line Items] |  |
Equity offering |  | $ 15.0
Payments to acquire additional interest in subsidiaries |  | $ 9.0
Noncontrolling interest, ownership percentage by parent | 60.00% |

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