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Available-for-Sale Securities (Tables)	12 Months Ended
	Dec. 31, 2012
Available-for-Sale Securities [Abstract]
Schedule of Available-for-Sale Securities	Certificates of deposit maturing in less than 12 months $ 2,211,287

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Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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