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
NET EARNINGS	$ 7,799	$ 11,370	$ 23,213	$ 28,861
OTHER COMPREHENSIVE INCOME (LOSS):
Gains and Losses on Derivatives	(7)	(9)	(23)	(27)
TOTAL OTHER COMPREHENSIVE INCOME	1,117	867	3,349	2,601
TOTAL COMPREHENSIVE INCOME	8,916	12,237	26,562	31,462
Pension Plans [Member]
OTHER COMPREHENSIVE INCOME (LOSS):
Defined Benefit Pension and Post-Retirement	1,958	1,682	5,874	5,047
Post-Retirement Plans [Member]
OTHER COMPREHENSIVE INCOME (LOSS):
Defined Benefit Pension and Post-Retirement	$ (834)	$ (806)	$ (2,502)	$ (2,419)