Total Outstanding Shares (Detail) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Class of Stock [Line Items]
Beginning Balance	(142,322)	(141,632)	(141,735)
Shares Issued	2,605	1,688	2,084
Repurchase of common stock at cost	(2,700)	(1,000)	(2,187)
Ending Balance	(142,241)	(142,322)	(141,632)
Common Stock
Class of Stock [Line Items]
Beginning Balance	(162,776)	(162,776)	(162,776)
Shares Issued	0	0	0
Repurchase of common stock at cost	0	0	0
Ending Balance	(162,776)	(162,776)	(162,776)
Treasury Stock
Class of Stock [Line Items]
Beginning Balance	(20,454)	(21,144)	(21,041)
Shares Issued	2,605	1,688	2,084
Repurchase of common stock at cost	(2,686)	(998)	(2,187)
Ending Balance	(20,535)	(20,454)	(21,144)