CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
NET INCOME	$ 19,618	$ 13,982	$ 31,633	$ 5,465
Pension and other postretirement benefit plans:
Net gain from curtailment, net of tax of: (2013 - Nine-month period $11,384)				17,878
Net actuarial gain (loss), net of tax of: (2014 - Three-month period $1,651, Nine-month period $5,139; 2013 - Three-month period $1,503, Nine-month period $8,121)	(2,595)	2,359	(8,072)	12,755
Pension settlement expense, net of tax of: (2014 - Three-month period $313, Nine-month period $2,102; 2013 - Three- and Nine-month periods $713)	492	1,121	3,303	1,121
Amortization of unrecognized net periodic benefit costs, net of tax of: (2014 - Three-month period $244, Nine-month period $711; 2013 - Three-month period $433, Nine-month period $2,662)
Net actuarial loss	413	709	1,202	4,267
Prior service credit	(29)	(29)	(87)	(87)
Foreign currency translation:
Change in foreign currency translation, net of tax of: (2014 - Three-month period $126, Nine-month period $85; 2013 - Three-month period $66, Nine-month period $21)	(198)	103	(134)	(32)
OTHER COMPREHENSIVE INCOME (LOSS), net of tax	(1,917)	4,263	(3,788)	35,902
TOTAL COMPREHENSIVE INCOME	$ 17,701	$ 18,245	$ 27,845	$ 41,367