Accounts Receivable, net - Additional Information (Detail) (Receivable Sales Agreement [Member])	6 Months Ended
	Jun. 30, 2014
Receivable Sales Agreement [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contract period	The term of this agreement matures in August 2014, with renewal options, but either party has an option to terminate the agreement pursuant to the terms of the agreement
Contract terms	Receive payment from the Bank no later than one business day after the Bank's acceptance of EDC's offer to sell the accounts receivables