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Stock-Based Compensation (Time Based Restricted Stock Awards) (Details) - Time Based Restricted Stock [Member]
6 Months Ended
Jun. 30, 2015
shares
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) 238,386
Awards granted (shares) 65,285
Stock issued (shares) (69,352)
Awards forfeited (shares) (4,969)
Non-vested awards outstanding ending balance (shares) 229,350