DISCONTINUED OPERATIONS (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment Charge on Reclassified Assets	$ 3,900,000
Revenues	0	351,445,000	801,502,000
Pretax income (loss)	(11,202,000)	8,040,000	19,482,000
Provision (benefit) for taxes on income	(11,495,000)	4,933,000	7,088,000
Income (loss) from discontinued operations, net of tax		3,107,000
Pretax gain on sale of discontinued operations		883,505,000
Provision for tax on gain on sale		285,510,000
Gain on sale of discontinued operations, net of tax		597,995,000
Discontinued operations, net of tax	(22,697,000)	601,102,000	12,394,000
Receivables - trade and other	0	4,000,000
Other assets	22,954,000	23,661,000
Assets of discontinued operations	22,954,000	27,661,000
Deferred revenues	20,122,000	20,122,000
Other current liabilities	1,133,000	4,883,000
Liabilities of discontinued operations	21,255,000	25,005,000
Manufacturing [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues		224,488,000	610,441,000
Pretax income (loss)	(7,599,000)	(8,583,000)	(1,276,000)
Provision (benefit) for taxes on income	15,751,000	1,507,000	(569,000)
Income (loss) from discontinued operations, net of tax		(10,090,000)
Pretax gain on sale of discontinued operations		670,614,000
Provision for tax on gain on sale		226,965,000
Gain on sale of discontinued operations, net of tax		443,649,000
Discontinued operations, net of tax	(23,350,000)	433,559,000	(707,000)
Receivables - trade and other	0	0
Other assets	22,954,000	23,661,000
Assets of discontinued operations	22,954,000	23,661,000
Deferred revenues	20,122,000	20,122,000
Other current liabilities	1,133,000	1,183,000
Liabilities of discontinued operations	21,255,000	21,305,000
Drilling [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	0	126,957,000	191,061,000
Pretax income (loss)	(3,603,000)	16,623,000	20,758,000
Provision (benefit) for taxes on income	(4,256,000)	3,426,000	7,657,000
Income (loss) from discontinued operations, net of tax		13,197,000
Pretax gain on sale of discontinued operations		212,891,000
Provision for tax on gain on sale		58,545,000
Gain on sale of discontinued operations, net of tax		154,346,000
Discontinued operations, net of tax	653,000	167,543,000	13,101,000
Receivables - trade and other	0	4,000,000
Other assets	0	0
Assets of discontinued operations	0	4,000,000
Deferred revenues	0	0
Other current liabilities	0	3,700,000
Liabilities of discontinued operations	$ 0	$ 3,700,000