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Financial Instruments	6 Months Ended
	Jun. 30, 2015
Financial Instruments [Abstract]
Financial Instruments	10.       Financial Instruments The carrying values of temporary cash investments, accounts receivable and accounts payable approximate their fair value due to the short-term nature of these financial instruments. The fair value of long-term loans and restricted cash balances, bearing interest at variable interest rates, approximate their recorded values as at June 30, 2015 and as of December 31, 2014.

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The entire disclosure for financial instruments. This disclosure includes, but is not limited to, fair value measurements of short and long term marketable securities, international currencies forward contracts, and auction rate securities. Financial instruments may include hedging and non-hedging currency exchange instruments, derivatives, securitizations and securities available for sale at fair value. Also included are investment results, realized and unrealized gains and losses as well as impairments and risk management disclosures.

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