Share-Based Compensation (Details 1) (Option activity under the 2003 Plan [Member], USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Option activity under the 2003 Plan [Member]
Summary of option activity
Option outstanding, Beginning	101,250
Option outstanding, Weighted Average Exercise Price, Beginning	$ 10.73
Option granted	21,698
Option granted, weighted average exercise price	$ 12.94
Option Exercised	(18,000)
Option Exercised, Weighted Average Exercise Price	$ 11.04
Option forfeited
Option forfeited, Weighted average exercise price
Option outstanding, Ending	104,948
Option outstanding, Weighted Average Exercise Price, Ending	$ 11.14
Option outstanding, Weighted Average Remaining Term	6 years 4 months 2 days
Option outstanding, Aggregate Intrinsic Value	$ 893,159
Option Exercisable	54,450
Option Exercisable, Weighted Average Exercise Price	$ 10.99
Option Exercisable, Weighted Average Remaining Term	4 years 6 months
Option Exercisable, Aggregate Intrinsic Value	$ 471,333