Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Investments (Details)

v2.4.0.6
Investments (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Short-term investments $ 0 $ 14,602
Long-term investments 1,634 32,581
Total investments 1,634 47,183
Auction Rate Securities [Member]
   
Long-term investments 1,634 2,000
Held-To-Maturity Securities [Member] | Bonds [Member]
   
Short-term investments 0 14,602
Long-term investments $ 0 $ 30,581