OTHER COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Pension and postretirement benefits [Abstract]
Amortization of net actuarial loss, Gross Amount	[1]	$ 1,740	$ 17	$ 5,226	$ 52
Amortization of net actuarial loss, Income Tax (Provision) Benefit	[1]	(668)	(6)	(2,000)	(19)
Amortization of net actuarial loss, Net Amount	[1]	1,072	11	3,226	33
Actuarial gains, Gross Amount	[1]	2	1	2,295	722
Actuarial gains, Income Tax (Provision) Benefit	[1]	0	(1)	(881)	(276)
Actuarial gains, Net Amount	[1]	2	0	1,414	446
Foreign currency translation adjustments, Gross Amount		49	(16)	81	(24)
Foreign currency translation adjustments, Income Tax (Provision) Benefit		0	0	0	0
Foreign currency translation adjustments, Net Amount		49	(16)	81	(24)
Change in fair value of derivative instruments [Abstract]
Reclassified to net earnings, Gross Amount	[2]	0	0	0	146
Reclassified to net earnings, Income Tax (Provision) Benefit	[2]	0	0	0	(62)
Reclassified to net earnings, Net Amount	[2]	0	0	0	84
Total other comprehensive income (loss), Gross Amount		1,791	2	7,602	896
Total other comprehensive income (loss), Income Tax (Provision) Benefit		(668)	(7)	(2,881)	(357)
Total other comprehensive income (loss), net of taxes		$ 1,123	$ (5)	$ 4,721	$ 539

[1] Actuarial gains (losses) are amortized into costs of sales and operating expenses or selling, general and administrative expenses as appropriate. (See Note 10 - Retirement Plans)

[2] Reclassifications to net earnings of derivatives qualifying as effective hedges are recognized in costs of sales and operating expenses.