ACCUMULATED OTHER COMPREHENSIVE INCOME LOSS ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Reclass) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]
Earnings before income taxes									$ 197,953		$ 135,362	$ 166,882
Income Tax Expense (Benefit)									59,972		43,073	48,262
Net earnings	47,307	36,361	33,370	20,943	38,493	11,299	22,740	41,312	137,981		113,844	126,389
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax									(245)	[1]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax									14,399	[1]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Curtailments, before Tax									(2,178)
Earnings before income taxes									(16,822)
Income Tax Expense (Benefit)									(6,141)
Net earnings									$ (10,681)

[1] These items are included in the computation of net periodic pension cost. See Note 17, Pension and Other Postretirement Benefit Plans.