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Employee Benefit and Deferred Compensation Plans (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended		3 Months Ended		6 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Employee Benefit and Deferred Compensation Plans (Textual) [Abstract]
Share based compensation arrangement by share based payment stock option granted, vested and exercisable (percent)	33.33%	33.33%
Treasury shares reissued (shares)					73,437
Total stock-based compensation expense			$ 477	$ 316	$ 955	$ 608
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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