Stockholders' Equity AOCI Reclassification (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Equity [Abstract]
Prior service cost	$ (71)	[1]	$ (81)	[1]
Actuarial loss	(345)	[1]	(485)	[1]
Total before tax	(416)		(566)
Tax benefit	163		221
Total reclassifications for the period, net of tax	$ (253)	[2]	$ (345)	[2]

[1] These accumulated other comprehensive loss components are included in the computation of net periodic pension and postretirement benefit cost for the three months ended March 31, 2014 and 2013 (see Note 11 for additional details).

[2] See the table below for details of reclassification from accumulated other comprehensive loss.