Employer Sponsored Benefit Plan (Target Allocation and the Actual Allocation of Plan Assets) (Detail)																			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Us Large Cap [Member]	Dec. 31, 2012 Us Large Cap [Member]	Dec. 31, 2013 Us Mid Cap [Member]	Dec. 31, 2012 Us Mid Cap [Member]	Dec. 31, 2013 Non Us Cap [Member]	Dec. 31, 2012 Non Us Cap [Member]	Dec. 31, 2013 Emerging Markets [Member]	Dec. 31, 2012 Emerging Markets [Member]	Dec. 31, 2013 Us Bonds [Member]	Dec. 31, 2012 Us Bonds [Member]	Dec. 31, 2013 Non Us Bonds [Member]	Dec. 31, 2012 Non Us Bonds [Member]	Dec. 31, 2013 Real Estate [Member]	Dec. 31, 2012 Real Estate [Member]	Dec. 31, 2013 Cash and Cash Equivalents [Member]	Dec. 31, 2012 Cash and Cash Equivalents [Member]	Dec. 31, 2013 Target Allocation 2014 Maximum [Member] Us Large Cap [Member]	Dec. 31, 2013 Target Allocation 2014 Maximum [Member] Us Mid Cap [Member]	Dec. 31, 2013 Target Allocation 2014 Maximum [Member] Non Us Cap [Member]	Dec. 31, 2013 Target Allocation 2014 Maximum [Member] Emerging Markets [Member]	Dec. 31, 2013 Target Allocation 2014 Maximum [Member] Us Bonds [Member]	Dec. 31, 2013 Target Allocation 2014 Maximum [Member] Non Us Bonds [Member]	Dec. 31, 2013 Target Allocation 2014 Maximum [Member] Real Estate [Member]	Dec. 31, 2013 Target Allocation 2014 Maximum [Member] Cash and Cash Equivalents [Member]	Dec. 31, 2013 Target Allocation 2014 Minimum [Member] Us Large Cap [Member]	Dec. 31, 2013 Target Allocation 2014 Minimum [Member] Us Mid Cap [Member]	Dec. 31, 2013 Target Allocation 2014 Minimum [Member] Non Us Cap [Member]	Dec. 31, 2013 Target Allocation 2014 Minimum [Member] Emerging Markets [Member]	Dec. 31, 2013 Target Allocation 2014 Minimum [Member] Us Bonds [Member]	Dec. 31, 2013 Target Allocation 2014 Minimum [Member] Non Us Bonds [Member]	Dec. 31, 2013 Target Allocation 2014 Minimum [Member] Real Estate [Member]	Dec. 31, 2013 Target Allocation 2014 Minimum [Member] Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation																			38.00%	22.00%	25.00%	9.00%	38.00%	8.00%	8.00%	5.00%	18.00%	4.00%	15.00%	3.00%	12.00%	2.00%	0.00%	0.00%
Actual Allocation of Plan Assets	2013.00%	2012.00%	26.00%	29.00%	11.00%	12.00%	23.00%	17.00%	7.00%	6.00%	26.00%	26.00%	5.00%	5.00%	0.00%	1.00%	2.00%	4.00%