Change in Accumulated Other Comprehensive Income (Loss), Net of tax (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance, accumulated other comprehensive income (loss), net of tax	$ (132,048)	$ (159,353)
Other comprehensive income (loss) before reclassifications	15,507	16,281
Amounts reclassified from accumulated other comprehensive income	5,686	11,024
Net current-period other comprehensive income (loss)	21,193	27,305
Ending balance, accumulated other comprehensive income (loss), net of tax	(110,855)	(132,048)
Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance, accumulated other comprehensive income (loss), net of tax	(381)	(7,257)
Other comprehensive income (loss) before reclassifications	(549)	515
Amounts reclassified from accumulated other comprehensive income	930	6,361
Net current-period other comprehensive income (loss)	381	6,876
Ending balance, accumulated other comprehensive income (loss), net of tax		(381)
Pension and Other Postretirement Benefits Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance, accumulated other comprehensive income (loss), net of tax	(127,257)	(134,548)
Other comprehensive income (loss) before reclassifications	25,464	2,628
Amounts reclassified from accumulated other comprehensive income	4,756	4,663
Net current-period other comprehensive income (loss)	30,220	7,291
Ending balance, accumulated other comprehensive income (loss), net of tax	(97,037)	(127,257)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance, accumulated other comprehensive income (loss), net of tax	(4,410)	(17,548)
Other comprehensive income (loss) before reclassifications	(9,408)	13,138
Net current-period other comprehensive income (loss)	(9,408)	13,138
Ending balance, accumulated other comprehensive income (loss), net of tax	$ (13,818)	$ (4,410)