Accumulated Other Comprehensive Income, Reclassified (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Amortization of pension and postretirement benefit plans [Abstract]
Prior service benefit		$ (27)	$ (755)	$ (85)	$ (2,264)
Unrecognized loss		676	569	1,806	1,707
Income tax expense		(264)	$ 68	(872)	$ 143
Total reclassifications for the period		(385)		(849)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Amortization of pension and postretirement benefit plans [Abstract]
Prior service benefit	[1]	(27)		(85)
Unrecognized loss	[1]	676		1,806
Total before income tax		649		1,721
Income tax expense		(264)		(872)
Total reclassifications for the period		$ 385		$ 849

[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 Note 10 for additional details)