Pension Plans - Net Periodic Benefit Cost (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net Periodic Benefit Cost Assumptions [Line Items]
Net periodic (benefit) cost			$ 9,245	$ (955)
Domestic Plans [Member]
Net Periodic Benefit Cost Assumptions [Line Items]
Interest cost	6,743	5,999	20,230	17,997
Expected return on plan assets	(6,875)	(9,577)	(20,626)	(28,730)
Recognized net actuarial loss and other	3,552	2,932	10,658	8,798
Net periodic (benefit) cost	3,420	(646)	10,262	(1,935)
TCN Plan [Member]
Net Periodic Benefit Cost Assumptions [Line Items]
Interest cost	475	466	1,425	1,400
Expected return on plan assets	(741)	(651)	(2,221)	(1,952)
Recognized net actuarial loss and other	(73)	507	(221)	1,522
Net periodic (benefit) cost	$ (339)	$ 322	$ (1,017)	$ 970