| Condensed Consolidated Financial Statements Detail - Additional Information 2 (Details) $ in Millions | 3 Months Ended | 
|---|---|
| Mar. 31, 2017  USD ($) | |
| Property, Plant and Equipment [Line Items] | |
| Total proceeds from sale of equipment | $ 1.6 | 
| Carrying value of equipment sold | 0.3 | 
| Other receivables related to sale of property and equipment | 0.8 | 
| Other Income (Expense) [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Gain on sale of equipment | $ 1.3 | 
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- Definition Amount classified as property, plant and equipment attributable to disposal group held for sale or disposed of. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount due from parties in nontrade transactions, classified as other. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Sale of property, plant and equipment. No definition available. 
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- Details 
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