Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
NET EARNINGS	$ 9,509	$ 6,914	$ 16,242	$ 15,414
Other comprehensive income (loss), net of tax	(7)	(8)	(14)	(16)
TOTAL COMPREHENSIVE INCOME, net of tax	8,998	8,030	15,219	17,646
Pension Plans [Member]
Other comprehensive income (loss), net of tax	0	1,958	(1)	3,916
Post-Retirement Plans [Member]
Other comprehensive income (loss), net of tax	$ (504)	$ (834)	$ (1,008)	$ (1,668)