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Share-Based Incentive Plan (Non-vested Restricted Stock) (Details) - Restricted Stock Plan [Member] - Restricted Stock [Member]
12 Months Ended
Dec. 31, 2018
shares
Nonvested Restricted Shares [Roll Forward]  
Balance, beginning of period (in shares) 162,127
Granted (in shares) 146,777
Forfeited (in shares) (16,027)
Vested (in shares) (53,565)
Balance, end of period (in shares) 239,312