Pension and Other Post-Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2011

Pension and Other Post-Retirement Plans

Combined amount of net periodic benefit cost recognized

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2011			2010			2011			2010
Components of net periodic pension benefit cost:
Service cost	$	589		$	478		$	1,512		$	1,421
Interest cost	1,114			1,226			3,461			3,699
Expected return on plan assets	(1,161		)	(1,243		)	(3,485		)	(3,695		)
Amortization of actuarial gains	95			124			284			403
Amortization of prior service costs	(54		)	6			(59		)	28
Net periodic cost	$	583		$	591		$	1,713		$	1,856