Other Noncurrent Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Other Liabilities [Line Items]
Benefit plan liabilities	$ 270,482	$ 284,614	$ 263,529
Noncurrent tax liabilities	188,122	213,658	192,143
Other	157,913	145,457	145,789
Total other noncurrent liabilities	$ 616,517	$ 643,729	$ 601,461