Pension and Other Post-Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2012

Compensation and Retirement Disclosure [Abstract]

Combined amount of net periodic benefit cost recognized

The following table sets forth the combined amount of net periodic benefit cost recognized for the three and six months ended June 30, 2012 and 2011:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2012			2011			2012			2011
Components of net periodic pension benefit cost:
Service cost	$	568		$	462		$	1,136		$	923
Interest cost	1,147			1,173			2,294			2,347
Expected return on plan assets	(1,227		)	(1,162		)	(2,454		)	(2,324		)
Amortization of actuarial gains	251			95			502			189
Amortization of prior service costs	(19		)	(3		)	(38		)	(5		)
Net periodic cost	$	720		$	565		$	1,440		$	1,130