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Derivative Instruments (Details 2) (Interest Rate Swap Agreements, Derivatives not designated as hedging instruments, Long-term liabilities-Derivatives instruments, USD $)	Mar. 31, 2014
Interest Rate Swap Agreements \| Derivatives not designated as hedging instruments \| Long-term liabilities-Derivatives instruments
Derivative asset and liability
Liability derivatives	$ 14,062,416

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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