Pension and Other Post-Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2011

Pension and Other Post-Retirement Plans

Combined amount of net periodic benefit cost recognized

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
Components of net periodic pension benefit cost:
Service cost	$	462		$	471		$	923		$	943
Interest cost	1,173			1,237			2,347			2,473
Expected return on plan assets	(1,162		)	(1,226		)	(2,324		)	(2,451		)
Amortization of actuarial gains	95			140			189			280
Amortization of prior service costs	(3		)	11			(5		)	22
Net periodic cost	$	565		$	633		$	1,130		$	1,267