Investments (Notes)

3 Months Ended

Dec. 31, 2012

Our investment portfolio primarily includes strategic investments in privately-held companies. We account for our strategic investments under either the cost or equity method of accounting. Our equity method investment balance is adjusted each period to recognize our proportionate share of investee net income or loss, including adjustments to recognize certain differences between our carrying value and our equity in the investee's net assets at the date of investment.

Total equity and cost method investment balances recorded as of December 31, 2012 and September 30, 2012 were as follows:



	December 31, 2012		September 30, 2012
Equity method investments	$	14,311	$	14,911
Cost method investments	67,527		50,710
Total investments	$	81,838	$	65,621

During the three months ended December 31, 2012, we invested a total of $16.8 million in several privately-held companies. We accounted for these investments under the cost method of accounting. No other-than-temporary impairment charge was recorded for the three months ended December 31, 2012 and 2011.