Joint Ventures	12 Months Ended
Dec. 31, 2012
Equity Method Investments and Joint Ventures [Abstract]
Joint Ventures	Joint Ventures CDI-Pycopsa In 2008, the Company formed CDI—Pycopsa Ingeniería y Construcción, S. de R.L. de C.V. (“CDI-Pycopsa”), a joint venture with a Mexico-based construction and industrial maintenance company. In June 2009, CDI-Pycopsa began operations. The Company consolidates CDI-Pycopsa based on the Company’s controlling interest. As of December 31, 2012, the Company had a 67% ownership interest in CDI-Pycopsa and had invested an aggregate of approximately $0.6 million. CDI-Pycopsa had pre-tax income of $1.2 million, $0.7 million and $0.4 million for the years ended December 31, 2012, 2011 and 2010, respectively. CTQ Engineering LLC (“CTQ”) In December 2006, the Company formed CTQ Engineering LLC (“CTQ”) with two engineering firms. Since July 2008, the Company has maintained a 50% ownership interest in CTQ. The Company accounts for its ownership interest in CTQ under the equity method of accounting based on its significant but non-controlling interest. The Company maintains a de minimis investment balance in CTQ. CDI Gulf International (“CGI”) In June 2008, the Company formed CDI Gulf International (“CGI”) with an engineering firm. The Company accounted for this investment in CGI under the equity method of accounting based on its 49% ownership interest. The Company invested $4.1 million in CGI in 2008. This investment was reduced to zero through the Company’s proportionate share of losses, which was $1.3 million in 2010, and a $1.0 million write-off in December 2010. The Company sold its interest in CGI for a de minimis amount during 2011.

Joint Ventures

CDI-Pycopsa

In 2008, the Company formed CDI—Pycopsa Ingeniería y Construcción, S. de R.L. de C.V. (“CDI-Pycopsa”), a joint venture with a Mexico-based construction and industrial maintenance company. In June 2009, CDI-Pycopsa began operations. The Company consolidates CDI-Pycopsa based on the Company’s controlling interest. As of December 31, 2012, the Company had a 67% ownership interest in CDI-Pycopsa and had invested an aggregate of approximately $0.6 million. CDI-Pycopsa had pre-tax income of $1.2 million, $0.7 million and $0.4 million for the years ended December 31, 2012, 2011 and 2010, respectively.

CTQ Engineering LLC (“CTQ”)

In December 2006, the Company formed CTQ Engineering LLC (“CTQ”) with two engineering firms. Since July 2008, the Company has maintained a 50% ownership interest in CTQ. The Company accounts for its ownership interest in CTQ under the equity method of accounting based on its significant but non-controlling interest. The Company maintains a de minimis investment balance in CTQ.

CDI Gulf International (“CGI”)

In June 2008, the Company formed CDI Gulf International (“CGI”) with an engineering firm. The Company accounted for this investment in CGI under the equity method of accounting based on its 49% ownership interest. The Company invested $4.1 million in CGI in 2008. This investment was reduced to zero through the Company’s proportionate share of losses, which was $1.3 million in 2010, and a $1.0 million write-off in December 2010. The Company sold its interest in CGI for a de minimis amount during 2011.