Net Periodic Benefit Cost (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Domestic Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost		$ 543	$ 888
Interest cost	28,454	30,639	31,460
Expected return on plan assets	(30,216)	(30,830)	(28,210)
Amortization of net loss	15,842	18,071	18,698
Amortization of prior service cost (credit)		(268)	(725)
Recognized (gain) loss due to curtailments and other adjustments	(24)	(1,185)
Net periodic benefit cost	14,056	16,970	22,111
Increase (decrease) in accumulated other comprehensive loss due to actuarial losses-before taxes	(37,973)	16,492	13,757
Net periodic benefit cost	(37,973)	16,492	13,757
TCN Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	2,740	2,305	2,179
Interest cost	2,379	2,185	1,766
Expected return on plan assets	(2,450)	(1,829)	(1,392)
Amortization of net loss	2,736	2,167	2,390
Amortization of prior service cost (credit)	16	16	16
Recognized (gain) loss due to curtailments and other adjustments	15		282
Net periodic benefit cost	5,436	4,844	5,241
Increase (decrease) in accumulated other comprehensive loss due to actuarial losses-before taxes	10,008	5,120	474
Decrease in accumulated other comprehensive loss due to curtailment gain	(17,267)
Net periodic benefit cost	$ (7,259)	$ 5,120	$ 474