Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Common Stock Reserved For Issuance Upon Exercise Of Stock Options) (Details)

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Stockholders' Equity (Common Stock Reserved For Issuance Upon Exercise Of Stock Options) (Details)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Common Class A [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 45,285 45,223
Common Class B [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 450 450