Pension Plans - Net Periodic Benefit Cost (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net Periodic Benefit Cost Assumptions [Line Items]
Net periodic (benefit) cost			$ 6,164	$ (641)
TCN Plan [Member]
Net Periodic Benefit Cost Assumptions [Line Items]
Interest cost	475	467	950	934
Expected return on plan assets	(740)	(650)	(1,480)	(1,301)
Recognized net actuarial loss (gain)	(74)	508	(148)	1,015
Net periodic (benefit) cost	(339)	325	(678)	648
Domestic Plans [Member]
Net Periodic Benefit Cost Assumptions [Line Items]
Interest cost	6,709	11,831	13,487	11,998
Expected return on plan assets	(6,876)	(16,153)	(13,751)	(19,153)
Recognized net actuarial loss (gain)	3,816	2,714	7,106	5,866
Net periodic (benefit) cost	$ 3,649	$ (1,608)	$ 6,842	$ (1,289)