LONG-TERM OBLIGATIONS, Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term debt	$ 388,992
Obligations under capital leases	56,438	$ 65,176
Other	24	30
Subtotal	388,992	345,716
Original issue discount on Senior Secured Notes	(1,919)	(2,345)
Subtotal	387,073	343,371
Less: Current portion of long-term obligations	(12,752)	(10,444)
Total long-term obligations	374,321	332,927
Senior Secured Notes Collateralized by Assets [Member]
Debt Instrument [Line Items]
Long-term debt	$ 300,000	250,000
Fixed interest rate (in hundredths)	11.00%
Debt Instrument, maturity date	Dec. 01, 2019
Note Payable Collateralized by Assets [Member] \| Global Marine Systems Limited [Member]
Debt Instrument [Line Items]
Long-term debt	$ 14,531	16,372
Basis spread on variable rate (in hundredths)	3.65%
Debt Instrument, maturity date	Dec. 31, 2019
Note Payable Collateralized by Assets [Member] \| American Natural Gas [Member]
Debt Instrument [Line Items]
Long-term debt	$ 736	810
Fixed interest rate (in hundredths)	5.50%
Debt Instrument, maturity date	Dec. 31, 2018
Note Payable Collateralized by Real Estate [Member] \| Schuff International, Inc [Member]
Debt Instrument [Line Items]
Long-term debt	$ 4,323	4,635
Basis spread on variable rate (in hundredths)	4.00%
Debt Instrument, maturity date	Dec. 31, 2019
Note Payable Collateralized by Equipment [Member] \| Schuff International, Inc [Member]
Debt Instrument [Line Items]
Long-term debt	$ 11,690	8,333
Basis spread on variable rate (in hundredths)	4.00%
Debt Instrument, maturity date	Dec. 31, 2019
Line Of Credit Collateralized By Assets [Member] \| Schuff International, Inc [Member]
Debt Instrument [Line Items]
Long-term debt	$ 1,250	$ 0
Credit agreement interest rate (in hundredths)	5.25%
Interest on special interest compensation fund (in hundredths)	1.00%

Interest rate charged on special interest compensation fund.

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- Definition

Long term debt and capital lease obligations current and non current.

+ References

No definition available.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

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The effective interest rate during the reporting period.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

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Amount of long-term debt and capital lease obligations including current maturities.

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Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Including both current and noncurrent portions, carrying amount as of the balance sheet date of other forms of debt not elsewhere specified in the taxonomy with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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