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Deferred Compensation Plans (Details) (USD $) In Millions, unless otherwise specified | 9 Months Ended | 0 Months Ended |
--- | --- | --- | ---
Sep. 30, 2012 | May 15, 2012 Long-term incentive program Apex Systems | Sep. 30, 2012 Long-term incentive program Apex Systems
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |
Proceeds from cash surrender value of life insurance policies | $ 1.5 |  |
Distributions to deferred compensation plan participants | 1.2 |  |
Long-term incentive plan term |  | 3 years |
Long-term incentive program, maximum award |  | 10.0 |
Long-term incentive plan accrual | $ 2.5 | $ 7.9 | $ 9.3

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