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v2.4.0.6

Subsequent Events (Details) (Subsequent events, USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013
Minimum |
Subsequent Events |
Expected incremental gross profit arising out of resolution with subcontractors | $ 1.0
Maximum |
Subsequent Events |
Expected incremental gross profit arising out of resolution with subcontractors | $ 1.6

X
- Definition Represents the amount of expected incremental gross profit arising out of resolution of remaining open issues with subcontractors. + References No definition available. + Details
Name: | fix_ExpectedIncrementalGrossProfitFromResolutionOfOpenIssuesWithSubcontractors
Namespace Prefix: | fix_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration