Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2012

Defined Benefit Pension Plans [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule Of Components Of Net Periodic Credit

	Three months ended June 30,						Six months ended June 30,
	2011			2012			2011			2012
	(In thousands)
Service cost	$	931		$	1,167		$	1,862		$	2,335
Interest cost		4,752			4,386			9,504			8,771
Expected return on plan assets		(13,310	)		(12,202	)		(26,620	)		(24,404	)
Amortization of accumulated other comprehensive income:
Prior service cost		308			308			616			616
Actuarial losses		2,569			4,443			5,138			8,885
Total credit	$	(4,750	)	$	(1,898	)	$	(9,500	)	$	(3,797	)

Other Postretirement Benefit Plans [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Schedule Of Components Of Net Periodic Credit

	Three months ended June 30,						Six months ended June 30,
	2011			2012			2011			2012
	(In thousands)
Service cost	$	33		$	39		$	64		$	79
Interest cost		573			507			1,147			1,014
Amortization of accumulated other comprehensive income:
Prior service credit		(4,043	)		(4,042	)		(8,085	)		(8,085	)
Actuarial losses		2,138			1,919			4,275			3,838
Total credit	$	(1,299	)	$	(1,577	)	$	(2,599	)	$	(3,154	)