STATEMENT OF CONSOLIDATED COMPREHENSIVE INCOME (UNAUDITED) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
STATEMENT OF CONSOLIDATED COMPREHENSIVE INCOME (UNAUDITED) [Abstract]
Net earnings	$ 19,313	$ 18,451	$ 30,207	$ 30,851
Other comprehensive (loss) income
Foreign currency translation adjustments	(12,010)	989	(1,658)	3,674
Defined benefit pension plans:
Amortization of prior service cost included in net periodic benefit cost	232	236	465	473
Amortization of unrecognized net loss included in net periodic benefit cost	(8,453)	(2,516)	(5,305)	(1,607)
Income tax (expense) related to defined benefit pension plans	3,025	844	1,181	419
Total defined benefit pension plans	(5,196)	(1,436)	(3,659)	(715)
Defined benefit postretirement plans:
Amortization of prior service cost included in net periodic benefit cost	13	13	26	25
Amortization of unrecognized net gain included in net periodic benefit cost	(45)	(295)	(89)	(356)
Income tax benefit related to defined benefit postretirement plans	5	104	16	123
Total defined benefit postretirement plans	(27)	(178)	(47)	(208)
Total other comprehensive (loss) income	(17,233)	(625)	(5,364)	2,751
Total comprehensive income	$ 2,080	$ 17,826	$ 24,843	$ 33,602