Subsidiaries with Noncontrolling Interest (Notes)	6 Months Ended
Subsidiaries with Noncontrolling Interest (Notes)	Jun. 30, 2013
Noncontrolling Interest [Abstract]
Subsidiaries with Noncontrolling Owners' Interest	Subsidiaries with Noncontrolling Owners' Interest The Company acquired a two-thirds ownership interest in a foreign entity ("OMG-ME") as part of its acquisition of the assets of West Construction, Inc. in October 2012. The Company fully consolidates OMG-ME in its financial statements and records the remaining one-third ownership in its results of operations as "Net loss attributable to noncontrolling interest".

The entire disclosure for noncontrolling interest in consolidated subsidiaries, which could include the name of the subsidiary, the ownership percentage held by the parent, the ownership percentage held by the noncontrolling owners, the amount of the noncontrolling interest, the location of this amount on the balance sheet (when not reported separately), an explanation of the increase or decrease in the amount of the noncontrolling interest, the noncontrolling interest share of the net Income or Loss of the subsidiary, the location of this amount on the income statement (when not reported separately), the nature of the noncontrolling interest such as background information and terms, the amount of the noncontrolling interest represented by preferred stock, a description of the preferred stock, and the dividend requirements of the preferred stock.

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