CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net income	$ 4,698	$ 9,463	$ 8,830	$ 22,759
Other comprehensive income, before tax:
Foreign currency translation adjustments	17,805	11,121	4,536	3,899
Pension settlement				118,350
Pension/postretirement plan remeasurement	14,417		14,417	(24,617)
Postretirement plan amendment	7,974		7,974
Amortization of pension liability adjustment
Transition obligation	17	22	51	59
Prior service (credit)/cost	(974)	(595)	(2,791)	(2,412)
Net actuarial loss	1,635	1,739	4,963	6,186
Derivative valuation adjustment	(398)	(235)	2,473	(899)
Income taxes related to items of other comprehensive income:
Pension settlement				(39,146)
Pension/postretirement plan remeasurement	(5,623)		(5,623)	7,270
Postretirement plan amendment	(3,110)		(3,110)
Amortization of pension liability adjustment	(265)	(361)	(806)	(1,188)
Derivative valuation adjustment	155	92	(964)	351
Other comprehensive income, net of tax	31,633	11,783	21,120	67,853
Comprehensive income	$ 36,331	$ 21,246	$ 29,950	$ 90,612