XML 33 R14.htm IDEA: XBRL DOCUMENT v2.4.0.6
Fair Value Measurement (Tables)
6 Months Ended
Jun. 30, 2012
Schedule of Fair Value, by Balance Sheet Grouping [Table Text Block]

 
Balance at
June 30,
2012
Balance at
December 31,
2011
Hierarchy
Level
Investments in marketable equity securities $33,851 $19,344 Level 1