Fair Value of Financial Instruments (Details Textual)	Mar. 31, 2014 Counterparty
Fair Value of Financial Instruments (Textual) [Abstract]
Number of counterparties for derivative financial instruments	2

Number of counterparties for derivative financial instruments.

No definition available.

Name:	escr_NumberOfCounterpartiesForDerivativeFinancialInstruments
Namespace Prefix:	escr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant