CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net earnings	$ 7,376	$ 33,465	$ 34,261	$ 84,783
Foreign currency translation adjustment, net of tax	1,090	(1,624)	657	341
Pension and other benefit adjustments:
Amortization of gains included in net periodic benefit costs, net of tax	(211)	(20)	(632)	(58)
Amortization of prior service credit included in net periodic benefit costs, net of tax	(254)		(762)
Unrealized gains on marketable securities:
Unrealized holding gains (losses) arising during the period, net of tax	(2,597)	(8,342)	762	(4,841)
Less: reclassification adjustment for gains included in investment expense (income), net of tax	(10)	(280)	(25)	(301)
Unrealized gains from equity method investees' cash flow hedge:
Unrealized holding gains arising during the period, net of tax	408	21	136	2,489
Holding (gains) losses reclassified to equity in earnings of non-consolidated entities, net of tax	134	(43)	397	(290)
Other comprehensive income (loss)	(1,440)	(10,288)	533	(2,660)
Total comprehensive income	$ 5,936	$ 23,177	$ 34,794	$ 82,123