Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2013

Components of Periodic Benefit Costs for Defined-Benefit Pension, Postretirement Healthcare and Supplemental Retirement Plan

The components of periodic benefit costs for the defined-benefit pension, postretirement healthcare and supplemental retirement plans were as follows for the three- and six-month periods ended June 30, 2013, and 2012 (in thousands):

	Defined-Benefit						Postretirement Healthcare				Supplemental
	Pension Plan						Plan				Retirement Plan
	Three Months						Three Months				Three Months
	Ended June 30,						Ended June 30,				Ended June 30,
	2013			2012			2013		2012		2013		2012
Service cost	$	254		$	216		$	10	$	10	$	13	$	8
Interest cost		471			477			14		18		40		40
Expected return on plan assets		(559	)		(509	)		—		—		—		—
Amortization of net actuarial loss {a}		564			470			2		5		56		48
Net periodic benefit cost	$	730		$	654		$	26	$	33	$	109	$	96

	Defined-Benefit						Postretirement Healthcare				Supplemental
	Pension Plan						Plan				Retirement Plan
	Six Months						Six Months				Six Months
	Ended June 30						Ended June 30				Ended June 30
	2013			2012			2013		2012		2013		2012
Service cost	$	508		$	431		$	19	$	18	$	25	$	15
Interest cost		941			953			29		36		79		80
Expected return on plan assets		(1,118	)		(1,018	)		—		—		—		—
Amortization of net actuarial loss {a}		1,128			943			4		11		113		96
Net periodic benefit cost	$	1,459		$	1,309		$	52	$	65	$	217	$	191

{a} The total amount of amortization of net actuarial loss for all retirement plans was $622 and $523 for the three-month periods ended June 30, 2013, and 2012, respectively, and $1,245 and $1,050 for the six-month periods ended June 30, 2013, and 2012, respectively.