Shareholders' Equity Restricted Stock (Details) (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross	304,402	157,702
Stock Issued During Period, Value, Restricted Stock Award, Gross	$ 1,858,300	$ 708,800
weighted average estimated fair value of restricted stock	$ 6.10	$ 4.49