Stockholders' Equity AOCI Reclassification (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2016		Jun. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Prior service cost	[1]	$ (50)		$ (907)		$ 100		$ 1,001
Actuarial loss	[1]	(406)		(930)		(812)		(1,858)
Total before tax		(456)		(1,837)		(912)		(2,859)
Tax effect		0		0		0		0
Total reclassifications for the period, net of tax		$ (456)	[2]	$ (1,837)	[2]	$ (912)	[3]	$ (2,859)	[3]

[1] These accumulated other comprehensive loss components are included in the computation of net periodic pension and postretirement benefit cost included in sales, general and administrative expense.

[2] (a) See reclassifications from accumulated other comprehensive loss table for details of reclassification from accumulated other comprehensive loss for the three month periods ended June 30, 2016 and 2015.

[3] See reclassifications from accumulated other comprehensive loss table for details of reclassification from accumulated other comprehensive loss for the six month periods ended June 30, 2016 and 2015.