SEGMENT INFORMATION (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Segment Reporting Information [Line Items]
Net sales	$ 404,719	$ 398,805	$ 1,327,040	$ 1,084,081
Gross profit (loss)	67,161	52,994	242,610	173,600
Income (loss) from operations	36,166	41,387	175,806	112,663
Interest expense	(6,187)	(6,616)	(18,699)	(19,045)
Noncash convertible debt conversion charge	0	0	0	(16,135)
Other income, net	2,439	(556)	6,163	1,907
Income (loss) before income taxes	32,418	34,215	163,270	79,390
Agricultural [Member]
Segment Reporting Information [Line Items]
Net sales	246,578	246,456	831,376	713,721
Gross profit (loss)	48,091	39,008	173,684	133,874
Income (loss) from operations	41,740	34,580	156,965	120,248
Earthmoving/construction [Member]
Segment Reporting Information [Line Items]
Net sales	103,135	81,078	318,244	224,484
Gross profit (loss)	18,689	8,814	60,598	28,227
Income (loss) from operations	13,468	7,418	51,385	23,408
Consumer [Member]
Segment Reporting Information [Line Items]
Net sales	55,006	71,271	177,420	145,876
Gross profit (loss)	1,016	5,812	10,488	13,567
Income (loss) from operations	(234)	3,615	30,284	9,352
Unallocated Amount to Segment [Member]
Segment Reporting Information [Line Items]
Gross profit (loss)	(635)	(640)	(2,160)	(2,068)
Income (loss) from operations	$ (18,808)	$ (4,226)	$ (62,828)	$ (40,345)

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