Off-Balance-Sheet Arrangements, Commitments, Guarantees and Contingencies (Future Minimum Lease Payments Due Under Non-Cancelable Operating Leases) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Operating Leased Assets [Line Items]
2013	$ 18,298
2014	16,410
2015	15,171
2016	13,728
2017	11,978
Thereafter	59,873
Future minimum lease payments due, total	$ 135,458

Off-Balance-Sheet Arrangements, Commitments, Guarantees and Contingencies (Future Minimum Lease Payments Due Under Non-Cancelable Operating Leases) (Detail) (USD $)
In Thousands, unless otherwise specified

Dec. 31, 2012

Operating Leased Assets [Line Items]

$ 18,298

16,410

15,171

13,728

11,978

59,873

Future minimum lease payments due, total

$ 135,458

- Definition

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References+ Details

- Definition

Amount of required minimum rental payments maturing in the next fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References+ Details

- Definition

Amount of required minimum rental payments maturing in the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References+ Details

- Definition

Amount of required minimum rental payments maturing in the forth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References+ Details

- Definition

Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References+ Details

- Definition

Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References+ Details

- Definition

Amount of required minimum rental payments maturing after the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

+ References+ Details