STATEMENT OF CONSOLIDATED COMPREHENSIVE INCOME (UNAUDITED) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
STATEMENT OF CONSOLIDATED COMPREHENSIVE INCOME (UNAUDITED) [Abstract]
Net earnings	$ 26,296	$ 14,425	$ 56,502	$ 45,276
Other comprehensive (loss) income
Foreign currency translation adjustments	15,692	(6,578)	14,034	(2,904)
Defined benefit pension plans:
Amortization of prior service cost included in net periodic benefit cost	232	236	697	709
Amortization of unrecognized net loss included in net periodic benefit cost	(2,203)	(979)	(7,508)	(2,936)
Income tax benefit related to defined benefit pension plans	3,514	1,509	4,695	2,277
Total defined benefit pension plans	1,543	766	(2,116)	50
Defined benefit postretirement plans:
Amortization of prior service cost included in net periodic benefit cost	13	13	38	38
Amortization of unrecognized net gain included in net periodic benefit cost	45	56	134	167
Income tax expense related to defined benefit postretirement plans	(80)	(96)	(240)	(440)
Total defined benefit postretirement plans	(22)	(27)	(68)	(235)
Total other comprehensive income (loss)	17,213	(5,839)	11,850	(3,089)
Total comprehensive income	$ 43,509	$ 8,586	$ 68,352	$ 42,187