Employee Benefit Plans (Schedule Of Net Periodic Pension Benefit Costs) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Interest cost	$ 15,513	$ 16,556	$ 16,113
Expected return on plan assets	(14,563)	(17,238)	(14,975)
Amortization of unrecognized net loss	2,344	1,358	2,200
Net periodic pension cost	3,294	676	3,338
Net actuarial loss (gain)	2,079	25,726	(24,753)
Total recognized in other comprehensive loss (income)	2,079	25,726	(24,753)
Total recognized in net periodic cost and other comprehensive loss (income)	$ 5,373	$ 26,402	$ (21,415)