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Stock-Based Compensation (Performance Based Restricted Stock Awards) (Details) (Performance-Based Restricted Stock [Member])
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3 Months Ended |
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Mar. 31, 2015
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Performance-Based Restricted Stock [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] | |
| Non-vested awards outstanding at beginning balance (shares) | 92,437 |
| Awards granted (shares) | 50,798 |
| Stock issued (shares) | (20,910) |
| Awards forfeited (shares) | (6,110) |
| Non-vested awards outstanding ending balance (shares) | 116,215 |