Supplemental Executive Retirement Plan (Tables)

9 Months Ended

Sep. 30, 2012

Supplemental Executive Retirement Plan

Components of net periodic benefit cost

	Three Months Ended September 30,				Nine Months Ended September 30,
	2012		2011		2012		2011
Service cost	$	1,078	$	1,079	$	3,236	$	3,176
Interest cost	369		352		1,106		1,004
Amortization of prior service costs	207		207		620		566
Amortization of net actuarial loss	—		20		—		71
Net pension expense	$	1,654	$	1,658	$	4,962	$	4,817