Fair Value

9 Months Ended

Sep. 30, 2011

Fair Value [Abstract]

Fair Value

7. Fair Value

     Our financial instruments are presented at fair value in our condensed consolidated balance sheets. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Where available, fair value is based on observable market prices or parameters or derived from such prices or parameters. Where observable prices or inputs are not available, valuation models may be applied. Assets and liabilities recorded at fair value in our condensed consolidated balance sheets are categorized based upon the level of judgment associated with the inputs used to measure their fair values. Hierarchical levels are directly related to the amount of subjectivity associated with the inputs to fair valuation of these assets and liabilities. Recurring fair value measurements are limited to investments in derivative instruments and some equity securities. The fair value measurements of our derivative instruments are determined using models that maximize the use of the observable market inputs including interest rate curves and both forward and spot prices for currencies, and are classified as Level II under the fair value hierarchy. The fair values of our derivatives are included above in Note 4. The fair value measurements of our investments in equity securities are determined using quoted market prices. The fair values of our investments in equity securities, and changes thereto, are immaterial to our consolidated financial position and results of operations.