Quarterly report pursuant to Section 13 or 15(d)

Share Based Compensation (Share Based Compensation Plans) (Details)

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Share Based Compensation (Share Based Compensation Plans) (Details) - Jun. 30, 2015 - shares
shares in Thousands
Total
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Director stock awards granted 1,625
Employee Stock Purchase Plan shares issued 20,470
Restricted stock awards granted 135,150
Restricted stock awards forfeited 0
Shares released from Deferred Compensation Plan 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Stock Options, Outstanding as of December 31, 2014 1,546,508
Stock Option, Granted 107,175
Stock Option, Exercised (40,128)
Stock Option, Expired (1,315)
Stock Options, Outstanding as of June 30, 2015 1,612,240
Shares available for future grants and ESPP purchases as of June 30, 2015 862,908