Pension and Other Post-Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2013

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 nine months ended September 30, 2013 and 2012:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2013			2012			2013			2012
Components of net periodic pension benefit cost:
Service cost	$	639		$	428		$	1,917		$	1,564
Interest cost	1,186			1,135			3,558			3,429
Expected return on plan assets	(1,409		)	(1,436		)	(4,227		)	(3,890		)
Amortization of actuarial gains	261			135			783			637
Amortization of prior service costs	(65		)	(113		)	(195		)	(151		)
Net periodic cost	$	612		$	149		$	1,836		$	1,589