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Share-Based Payments (Details 2) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Cash proceeds from stock options exercised $ 402 $ 428
Tax benefits 0 0
Intrinsic value of stock options exercised $ 233 $ 462