Fair Value Measurements (Details 1) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Oct. 31, 2012	Oct. 31, 2011
Level 1 [Member]
Assets:
Short-term / Long-term investments	$ 50,057	$ 50,264
Other long-term assets	0	0
Total assets measured at fair value	50,057	50,264
Level 2 [Member]
Assets:
Short-term / Long-term investments	0	0
Other long-term assets	0	0
Total assets measured at fair value	0	0
Level 3 [Member]
Assets:
Short-term / Long-term investments	0	0
Other long-term assets	420	7,020
Total assets measured at fair value	420	7,020
Total [Member]
Assets:
Short-term / Long-term investments	50,057	50,264
Other long-term assets	420	7,020
Total assets measured at fair value	$ 50,477	$ 57,284