Accumulated Other Comprehensive Income, Reclassified (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Amortization of pension and postretirement benefit plans [Abstract]
Prior service benefit		$ (112)	$ (3,017)	$ (4,317)
Unrecognized loss		2,261	2,435	3,123
Income tax (expense) benefit		(1,325)	372	$ 577
Total reclassifications for the period		824	(210)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Amortization of pension and postretirement benefit plans [Abstract]
Prior service benefit	[1]	(112)	(3,017)
Unrecognized loss	[1]	2,261	2,435
Total before income tax		2,149	(582)
Income tax (expense) benefit		(1,325)	372
Total reclassifications for the period		$ 824	$ (210)

[1] These accumulated other comprehensive income components are included in the computation of net periodic pension and postretirement benefit costs, which are included in selling, general and administrative expenses in our consolidated statements of operations (see Notes 13 and 14 for additional details).