Accumulated Comprehensive Income Reclassifications out of Accumulated Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Prior service cost	$ 40	[1]
Actuarial loss	218	[1]
Total before tax	258
Income tax benefit	(96)
Amount reclassified out of accumulated other comprehensive loss	$ 162

[1] These accumulated other comprehensive loss components are included in the computation of net periodic pension cost (income) in Note 3 Employee Benefit Plans.