Retirement Plan (Tables)

9 Months Ended

Sep. 30, 2011

Retirement Plan [Abstract]

Net Periodic Pension Expense

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
	(In thousands)
Service cost – benefit earned during the period	$	1,268		$	1,149		$	3,803		$	3,446
Interest cost on projected benefit obligations		1,281			1,288			3,844			3,865
Expected return on plan assets		(1,244	)		(1,144	)		(3,923	)		(3,432	)
Amortization of prior service cost		97			98			293			293
Amortization of net loss		529			549			1,594			1,647
Estimated effect of curtailment		798			—			798			—
Net periodic pension expense	$	2,729		$	1,940		$	6,409		$	5,819