Remaining Maturities of Short Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Short-term Debt [Line Items]
Short-term debt	$ 1,887,688	$ 862,763
Within 30 Days
Short-term Debt [Line Items]
Short-term debt	548,890	659,262
31 to 90 Days
Short-term Debt [Line Items]
Short-term debt	213,330	54,434
Over 90 Days
Short-term Debt [Line Items]
Short-term debt	$ 1,125,468	$ 149,067

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Balance Type:	credit
Period Type:	instant