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Commitments and Contingencies (Details) (Surety) | 9 Months Ended
--- | ---
Sep. 30, 2014
Minimum |
Surety |
Percentage of business which has required bonds | 25.00%
Maximum |
Surety |
Percentage of business which has required bonds | 35.00%

X
- Details
Name: | fix_LossContingencySuretyAbstract
Namespace Prefix: | fix_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of business which has required bonds. + References No definition available. + Details
Name: | fix_PercentageOfBusinessWhichHasRequiredBonds
Namespace Prefix: | fix_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration