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Advances and other assets consists (Parenthetical) (Detail) (USD $)
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12 Months Ended |
|---|---|
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Dec. 31, 2012
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| Schedule Of Other Assets [Line Items] | |
| Sales type lease unearned income | 374,000 |
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Signing bonuses to independent sales agents
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| Schedule Of Other Assets [Line Items] | |
| Signing bonuses to independent sales agents | contracts from three to ten years |
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Non-interest bearing advances to independent sales
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| Schedule Of Other Assets [Line Items] | |
| Advances repayable term | 2018 |
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Loans to independent sales agents bearing interest
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| Schedule Of Other Assets [Line Items] | |
| Loans receivable description of variable rate basis | prime plus 1 |
| Loans receivable basis spread on variable rate | 1.00% |
| Loans repayable term | 2021 |
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Sales-type leases
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| Schedule Of Other Assets [Line Items] | |
| Sales type lease original term | Sales-type leases with original terms of 48 months |
| Sales type lease term year | 2016 |
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Due from independent sales agents and employees
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| Schedule Of Other Assets [Line Items] | |
| Advances repayable term | 2021 |