Other Noncurrent Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012
Other Liabilities [Line Items]
Benefit plan liabilities	$ 279,005	$ 284,614	$ 265,085
Noncurrent tax liabilities	202,441	213,658	193,704
Other	155,107	145,457	143,853
Total other noncurrent liabilities	$ 636,553	$ 643,729	$ 602,642