Accumulated Other Comprehensive Income, Reclassified (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Amortization of pension and postretirement benefit plans [Abstract]
Prior service benefit		$ (29)	$ (755)	$ (58)	$ (1,509)
Unrecognized loss		512	546	1,130	1,138
Income tax expense		(367)	$ 17	(608)	$ 75
Total reclassifications for the period		(116)		(464)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Amortization of pension and postretirement benefit plans [Abstract]
Prior service benefit	[1]	(29)		(58)
Unrecognized loss	[1]	512		1,130
Total before income tax		483		1,072
Income tax expense		(367)		(608)
Total reclassifications for the period		$ 116		$ 464

[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)