Stockholders' Equity AOCI Reclassification (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Equity [Abstract]
Prior service cost	$ (71)	[1]	$ (80)	[1]	$ (212)	[1]	$ (242)	[1]
Actuarial loss	(345)	[1]	(485)	[1]	(1,035)	[1]	(1,455)	[1]
Total before tax	(416)		(565)		(1,247)		(1,697)
Tax effect	162		219		486		661
Total reclassifications for the period, net of tax	$ (254)	[2]	$ (346)	[2]	$ (761)	[2]	$ (1,036)	[2]

[1] These accumulated other comprehensive loss components are included in the computation of net periodic pension and postretirement benefit cost for the three and nine months ended September 30, 2014 and 2013 (see Note 11 for additional details).

[2] See reclassifications from accumulated other comprehensive loss table for details of reclassification from accumulated other comprehensive loss for the three and nine months ended September 30, 2014 and 2013.