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Schedule of supplemental disclosures of cash flow information (Tables)
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Dec. 31, 2013
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| Schedule of supplemental disclosures of cash flow information: | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of supplemental disclosures of cash flow information | The following represents required supplemental disclosures of cash flow information and non-cash financing and investing activities which occurred during the years ended December 31, 2013, 2012 and 2011:
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