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Stock Incentive Plan Summary of Unvested Options (Details) (USD $)
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12 Months Ended | |||
|---|---|---|---|---|
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Options, Nonvested, Number | 6,625 | 20,875 | 35,125 | 49,375 |
| Options, Nonvested, Weighted Average Grant Date Fair Value | $ 2.51 | $ 3.16 | $ 3.29 | $ 3.34 |
| Options, Vested in Period, Number | (14,250) | (14,250) | (14,250) | |
| Options, Vested in Period, Weighted Average Grant Date Fair Value | $ 3.47 | $ 3.47 | $ 3.47 | |
| Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options | $ 0 | $ 17,000 | $ 69,000 | |