Minimum Future Payments Under Noncancelable Operating Leases (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Schedule of Operating Leases [Line Items]
2012	$ 14,742
2013	13,223
2014	10,795
2015	7,312
2016	7,097
2017 and thereafter	25,708
Net minimum operating lease payments	$ 78,877

The total of future contractually required payments on leases defined as operating.

+ References+ Details

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within one year of the balance sheet date relating to leases defined as operating.

+ References+ Details

- Definition

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fifth year of the balance sheet date relating to leases defined as operating.

+ References+ Details

- Definition

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fourth year of the balance sheet date relating to leases defined as operating.

+ References+ Details

- Definition

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the third year of the balance sheet date relating to leases defined as operating.

+ References+ Details

- Definition

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the second year of the balance sheet date relating to leases defined as operating.

+ References+ Details

- Definition

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due after the fifth year from the balance sheet date on leases defined as operating.

+ References+ Details