The amount of the gain (loss) recognized by the parent and included in its attributable portion of net income for the period due to deconsolidation of a subsidiary or derecognition of a group of assets. The gain (loss) recognized and included in the net income attributable to the parent for the period is generally computed as the difference between: (a) the aggregate of: (1) the fair value of any consideration received; (2) the fair value of any retained noncontrolling investment in the former subsidiary at the date the subsidiary was deconsolidated; and (3) the carrying amount of any noncontrolling interest in the former subsidiary (including any accumulated other comprehensive income attributable to the noncontrolling interest) at the date the subsidiary was deconsolidated and (b) the carrying amount of the former subsidiary's assets and liabilities.

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

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Investment (Business Combinations) (Details) (Shanghai Jiayu [Member], USD $)	12 Months Ended
	Dec. 31, 2012	Mar. 31, 2012	Mar. 31, 2010	Aug. 19, 2008
Shanghai Jiayu [Member]
Equity Method Investment, Financial Statement, Reported Amounts [Abstract]
Ownership interest percentage		65.00%	65.00%	65.00%
Purchase price				$ 59,400,000
Equity method investment estimated fair value		0
Note receivable write down	12,000,000
Deconsolidation loss recognized	4,200,000
Deconsolidation gain allocated based on noncontrolling interest	$ 4,200,000