Equity Plans and Equity Based Compensation (Additional Information) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	481,791
Schedule Of Share Based Compensation Restricted Stock and Restricted Stock Grant During Period Percentage	50.00%
Schedule Of Share Based Compensation Restricted Stock and Restricted Stock Cash Credit Entitlement Percentage	50.00%
Schedule Of Share Based Compensation Restricted Stock and Restricted Stock Vested In Percentage	100.00%
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	29,170	30,019
Unrecognized Stock Expenses In Restricted Stock	$ 1,112	$ 601
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date	95.00%
Share Based Compensation Arrangement By Share Based Payment Award Options Vested In Period Percentage	33.30%
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	500,000