Pension Plan (Tables)

9 Months Ended

Sep. 30, 2011

Pension Plan [Abstract]

Components Of Net Periodic Benefit Expense

(in thousands)	Three months ended September 30,						Nine months ended September 30,
	2011			2010			2011			2010
Service cost	$	1,139		$	918		$	3,417		$	2,754
Interest cost		992			895			2,976			2,687
Expected return on plan assets		(1,885	)		(1,476	)		(5,657	)		(4,390	)
Amortization of prior service cost		5			6			15			16
Recognized net actuarial loss		352			269			1,057			809
Benefit expense	$	603		$	612		$	1,808		$	1,876