Pension And Other Postretirement Benefit Plans (Components Of Net Periodic Cost) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,258	$ 1,529
Interest cost	10,234	9,410
Expected return on plan assets	(15,713)	(13,212)
Amortization of prior service cost	30	(6)
Amortization of net loss (gain)	1,257	3,164
Net periodic cost	(2,934)	885
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service cost	17	27
Interest cost	101	125
Amortization of prior service cost	(59)	(59)
Amortization of net loss (gain)	(33)	(35)
Net periodic cost	$ 26	$ 58