Changes In Equity And Comprehensive Income (Classification Of Accumulated Other Comprehensive Income Reflected On Consolidated Balance Sheets) (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, beginning balance	$ (128,077)
Other comprehensive income before reclassifications	(22,184)
Amounts reclassified from accumulated other comprehensive income	4,582
Net current-period othre comprehensive income (loss)	(17,602)
Accumulated other comprehensive loss, ending balance	(145,679)	(128,077)
Changes in pension and post-retirement plan assets and benefit obligation, Tax benefit	87,368	89,540
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, beginning balance	(197,806)
Other comprehensive income before reclassifications	0
Amounts reclassified from accumulated other comprehensive income	4,582
Net current-period othre comprehensive income (loss)	4,582
Accumulated other comprehensive loss, ending balance	(193,224)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, beginning balance	69,729
Other comprehensive income before reclassifications	(22,184)
Amounts reclassified from accumulated other comprehensive income	0
Net current-period othre comprehensive income (loss)	(22,184)
Accumulated other comprehensive loss, ending balance	$ 47,545