Reclassifications Out of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ 19,087	$ 12,947	$ 38,418	$ 25,149
Income tax benefit	38,929	23,906	38,117	15,482
Earnings from Continuing Operations	81,979	59,680	88,138	36,542
Reclassification out of Accumulated Other Comprehensive Income | Pension and Postretirement Benefit Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Prior service credit	(469)	(791)	(939)	(1,404)
Actuarial loss	7,274	804	10,546	1,889
Income tax benefit	(2,647)	(5)	(3,737)	(191)
Earnings from Continuing Operations	4,158	8	5,870	294
Reclassification out of Accumulated Other Comprehensive Income | Pension and Postretirement Benefit Plans | Cost of sale; Selling, General & Administrative Expenses
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications out of accumulated other comprehensive loss before taxes	6,805	13	9,607	485
Reclassification out of Accumulated Other Comprehensive Income | Unamortized Value of Terminated Forward Starting Interest Rate Swap
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	317	295	624	583
Income tax benefit	(125)	(116)	(245)	(230)
Earnings from Continuing Operations	$ 192	$ 179	$ 379	$ 353