Commitments & Contingencies (Details Textual) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Commitments & Contingencies (Textual) [Abstract]
Accrued Insurance Liabilities	$ 10,459,000	$ 10,580,000
Trade accounts receivable	104,177,000	104,091,000
Credit risk international project contract [Member]
Commitments & Contingencies (Textual) [Abstract]
Trade accounts receivable	1,600,000
Pay when paid receivable	200,000
Loss Contingency Estimate	1,400,000
Baker Energy [Member]
Commitments & Contingencies (Textual) [Abstract]
Corresponding receivable	1,900,000	2,500,000
Baker Energy [Member] | Group Insurance Policies [Member]
Commitments & Contingencies (Textual) [Abstract]
Accrued Insurance Liabilities	2,700,000	3,300,000
Reliance Group [Member]
Commitments & Contingencies (Textual) [Abstract]
Amount recoverable under Insurance policy with Reliance	2,500,000
Related receivables recorded from Reliance	0	0
Distribution from Reliance related to claims received	$ 1,100,000