CONDENSED CONSOLIDATING FINANCIAL INFORMATION (Details 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net earnings	$ 12,178	$ 7,376	$ 62,239	$ 34,261
Foreign currency translation adjustment, net of tax	700	1,090	981	657
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	7	(211)	(1,686)	(632)
Less: reclassification adjustment for prior service credit realized in net earnings, net of tax		(254)	(1,762)	(762)
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)
Marketable securities:
Unrealized net holding gain (loss) arising during the period, net of tax	(2,311)	(2,597)	(1,868)	762
Realized net gain reclassified into investment expense (income), net of tax	(5)	(10)	(154)	(25)
Equity method investees' cash flow hedge:
Unrealized net holding gain (loss) arising during the period, net of tax	(465)	408	(847)	136
Realized net loss reclassified into equity in earnings of non-consolidated entities, net of tax	112	134	351	397
Other comprehensive income (loss)	(1,962)	(1,440)	(11,698)	533
Total comprehensive income	10,216	5,936	50,541	34,794
Consolidating Adjustments
Net earnings	(9,405)	(3,804)	(53,077)	(23,124)
Equity in other comprehensive income (loss) of subsidiaries	1,559	751	11,391	(788)
Equity method investees' cash flow hedge:
Other comprehensive income (loss)	1,559	751	11,391	(788)
Total comprehensive income	(7,846)	(3,053)	(41,686)	(23,912)
AMCE
Net earnings	12,178	7,376	62,239	34,261
Equity in other comprehensive income (loss) of subsidiaries	(1,962)	(1,440)	(11,698)	533
Equity method investees' cash flow hedge:
Other comprehensive income (loss)	(1,962)	(1,440)	(11,698)	533
Total comprehensive income	10,216	5,936	50,541	34,794
Subsidiary Guarantors
Net earnings	9,881	4,292	54,014	24,585
Equity in other comprehensive income (loss) of subsidiaries	403	689	307	255
Foreign currency translation adjustment, net of tax	297	401	674	402
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	7	(211)	(1,686)	(632)
Less: reclassification adjustment for prior service credit realized in net earnings, net of tax		(254)	(1,762)	(762)
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)
Marketable securities:
Unrealized net holding gain (loss) arising during the period, net of tax	(2,311)	(2,597)	(1,868)	762
Realized net gain reclassified into investment expense (income), net of tax	(5)	(10)	(154)	(25)
Equity method investees' cash flow hedge:
Unrealized net holding gain (loss) arising during the period, net of tax	(465)	408	(847)	136
Realized net loss reclassified into equity in earnings of non-consolidated entities, net of tax	112	134	351	397
Other comprehensive income (loss)	(1,962)	(1,440)	(11,698)	533
Total comprehensive income	7,919	2,852	42,316	25,118
Subsidiary Non-Guarantors
Net earnings	(476)	(488)	(937)	(1,461)
Foreign currency translation adjustment, net of tax	403	689	307	255
Equity method investees' cash flow hedge:
Other comprehensive income (loss)	403	689	307	255
Total comprehensive income	$ (73)	$ 201	$ (630)	$ (1,206)