CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net earnings (loss)	$ 43,923	$ 31,393	$ 50,061	$ 26,885
Foreign currency translation adjustment, net of tax	(695)	(599)	281	(433)
Pension and other benefit adjustments:
Net loss arising during the period, net of tax			(45)
Prior service credit arising during the period, net of tax			746
Less: reclassification adjustment for net (gain) loss realized in net earnings, net of tax	6	(210)	(1,693)	(421)
Less: reclassification adjustment for prior service credit realized in net earnings, net of tax		(254)	(1,762)	(508)
Less: reclassification adjustment for curtailment gain realized in net earnings, net of tax			(7,239)
Less: reclassification adjustment for settlement gain realized in net earnings, net of tax			(175)
Unrealized net gain on marketable securities
Unrealized net holding gain (loss) arising during the period, net of tax	(382)	1,340	443	3,359
Less: reclassification adjustment for net gain realized in net earnings, net of tax	(145)	(11)	(149)	(15)
Unrealized net gain from equity method investees' cash flow hedge:
Unrealized net holding gain arising during the period, net of tax	(21)	(240)	(382)	(272)
Less: reclassification adjustment for net loss realized in net earnings, net of tax	117	132	239	263
Other comprehensive income (loss)	(1,120)	158	(9,736)	1,973
Total comprehensive income	$ 42,803	$ 31,551	$ 40,325	$ 28,858