Other Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Schedule of Other Assets [Line Items]
Deferred income taxes-noncurrent	$ 64,512	[1]	$ 50,957	[1]
Assets related to unrecognized tax benefits	25,788	[1]	21,794	[1]
Long-term advances to joint ventures	25,017	[2]
Other	39,519		44,120
Total	$ 154,836		$ 116,871

[1] See Note 18, "Income Taxes."

[2] See Note 8, "Investments."