Guarantees and Indemnifications (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Guarantor Obligations [Line Items]
Guarantees and Indemnifications Outstanding Amount, Expires Within One Year	$ 67,409
Guarantees and Indemnifications Outstanding Amount, Expires After One Year
Guarantees and Indemnifications, Total Outstanding Amount	67,409
Guarantees and Indemnifications, Maximum Potential Amount of Future Payments	213,722
Financial Standby Letter of Credit
Guarantor Obligations [Line Items]
Guarantees and Indemnifications Outstanding Amount, Expires Within One Year	39,983
Guarantees and Indemnifications Outstanding Amount, Expires After One Year
Guarantees and Indemnifications, Total Outstanding Amount	39,983
Guarantees and Indemnifications, Maximum Potential Amount of Future Payments	99,100
Performance Guarantee
Guarantor Obligations [Line Items]
Guarantees and Indemnifications Outstanding Amount, Expires Within One Year	12,200
Guarantees and Indemnifications Outstanding Amount, Expires After One Year
Guarantees and Indemnifications, Total Outstanding Amount	12,200
Guarantees and Indemnifications, Maximum Potential Amount of Future Payments	12,951
Commercial Letters of Credit
Guarantor Obligations [Line Items]
Guarantees and Indemnifications Outstanding Amount, Expires Within One Year	15,226
Guarantees and Indemnifications Outstanding Amount, Expires After One Year
Guarantees and Indemnifications, Total Outstanding Amount	15,226
Guarantees and Indemnifications, Maximum Potential Amount of Future Payments	$ 101,671