v3.3.1.900

Summary of Significant Accounting Policies (Details 3) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 USD ($) segment | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Planned Major Maintenance Costs |  |  |
Turnaround costs | $ 7.0 |  |
Cost Classifications |  |  |
Depreciation expense incurred related to the cost of product sold | 0.6 | $ 0.4 | $ 0.3
Depreciation and amortization not included in direct operating expenses | $ 27.8 | $ 26.8 | $ 25.3
Segment Reporting |  |  |
Number of operating segments | segment | 1 |  |
Revenue Recognition |  |  |
Expected period of delivery of deferred revenue | 12 months |  |
Minimum |  |  |
Planned Major Maintenance Costs |  |  |
Frequency of planned major maintenance activities | 2 years |  |
Maximum |  |  |
Planned Major Maintenance Costs |  |  |
Frequency of planned major maintenance activities | 3 years |  |

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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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