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Organization, Business and Basis of Presentation (Details Textual) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Organization Consolidation and Presentation of Financial Statements [Line Items]
Operating Income (Loss)	$ 11,597us-gaap_OperatingIncomeLoss	$ 10,132us-gaap_OperatingIncomeLoss
Net Income (Loss) Attributable to Parent	7,172us-gaap_NetIncomeLoss	6,272us-gaap_NetIncomeLoss
Earnings Per Share, Diluted	$ 0.34us-gaap_EarningsPerShareDiluted	$ 0.29us-gaap_EarningsPerShareDiluted
Contracts Accounted for under Percentage of Completion [Member] \| Cost Estimate Revision [Member]
Organization Consolidation and Presentation of Financial Statements [Line Items]
Cost Estimate Revision Gross Margin Increase Percentage	1.50%	1.70%
Estimate Adjustment [Member]
Organization Consolidation and Presentation of Financial Statements [Line Items]
Operating Income (Loss)	3,700	3,700
Net Income (Loss) Attributable to Parent	$ 2,300	$ 2,300
Earnings Per Share, Diluted	$ 0.11	$ 0.11

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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