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Share-Based Compensation (Restricted Share Activity) (Details) - $ / shares
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Number of Restricted Shares      
Nonvested balance, beginning 154,998 169,418 189,012
Granted 53,790 64,522 50,060
Vested (64,874) (78,942) (69,654)
Forfeited (8,443) 0 0
Nonvested balance, ending 135,471 154,998 169,418
Weighted Average Grant-Date Fair Value      
Nonvested balance, beginning $ 16.97 $ 11.55 $ 9.10
Granted 22.52 22.49 16.50
Vested 15.23 9.86 8.44
Forfeited 15.03 0.00 0.00
Nonvested balance, ending $ 20.13 $ 16.97 $ 11.55