Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
NET EARNINGS	$ 6,733	$ 8,500
Other comprehensive income (loss), net of tax	(7)	(8)
TOTAL COMPREHENSIVE INCOME, net of tax	6,221	9,616
Pension Plans [Member]
Other comprehensive income (loss), net of tax	(1)	1,958
Post-Retirement Plans [Member]
Other comprehensive income (loss), net of tax	$ (504)	$ (834)