The special dividend has been announced by now 3 of the last 4 years. It was paid along with the regular quarterly dividend in October of 2008, 2009 and 2011. The special was $2.00 in 2008 (plus 20 cents regular), $1.80 in 2009, and $2.25 in 2011.
In 2010 the special was $2.50. It was announced November 17 with the release of the quarterly report. The 20 cent regular quarterly dividend had been paid in October. The special dividend of $2.50 was paid in December.