This item represents the aggregate carrying amount of all cost-method investments as reported on or included in the balance sheet. The original cost of the investments may differ from the aggregate carrying amount disclosed due to various adjustments such as: (i) dividends received in excess of earnings after the date of investment that are considered a return of investment and therefore recorded as reductions to cost of the investment, or (ii) a series of operating losses of an investee or other factors which may indicate that a decrease in value of the investment has occurred which is other than temporary and accordingly such decrease in value has been recognized.

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+ Details

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References+ Details

Investments - Additional Information (Detail) (USD $)	Mar. 31, 2013 Asola	Jan. 04, 2008 Asola	Mar. 31, 2013 Shigan Quantum Technologies Pvt Ltd	Dec. 31, 2012 Shigan Quantum Technologies Pvt Ltd	Sep. 03, 2009 Shigan Quantum Technologies Pvt Ltd	Mar. 31, 2013 Fisker Automotive, Inc	Dec. 31, 2012 Fisker Automotive, Inc	Aug. 07, 2007 Fisker Automotive, Inc	Mar. 31, 2013 Fisker Automotive, Inc Maximum
Schedule of Equity Method Investments [Line Items]
Percentage of ownership acquired		24.90%			25.00%				1.00%
Percentage of ownership interest acquired								62.00%
Investment amount in subsidiary under cost method	$ 0		$ 0	$ 5,998		$ 0	$ 0