Fair Value (Nonrecurring Unobservable Inputs) (Details) - Income Approach Valuation Technique [Member]	12 Months Ended
Dec. 31, 2015
Minimum \| Long Lived Assets Held And Used [Member] \| Kilroot [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	(88.00%)
Fair Value Inputs, Long-term Pre-tax Operating Margin, Percent	(74.00%)
Minimum \| Long Lived Assets Held And Used [Member] \| buffalo gap III [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	(2.00%)
Fair Value Inputs, Long-term Pre-tax Operating Margin, Percent	(282.00%)
Maximum \| Long Lived Assets Held And Used [Member] \| Kilroot [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	6.00%
Fair Value Inputs, Long-term Pre-tax Operating Margin, Percent	10.00%
Maximum \| Long Lived Assets Held And Used [Member] \| buffalo gap III [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	19.00%
Fair Value Inputs, Long-term Pre-tax Operating Margin, Percent	58.00%
Weighted Average \| Long Lived Assets Held And Used [Member] \| Kilroot [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	(7.00%)
Fair Value Inputs, Long-term Pre-tax Operating Margin, Percent	0.00%
Fair Value Inputs, Discount Rate	6.00%
Weighted Average \| Long Lived Assets Held And Used [Member] \| buffalo gap III [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	3.00%
Fair Value Inputs, Long-term Pre-tax Operating Margin, Percent	24.00%
Fair Value Inputs, Discount Rate	9.00%
Equity Method Investments [Member] \| Minimum \| Solar Spain [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	(3.00%)
Fair Value Inputs, Long-term Pre-tax Operating Margin, Percent	(13.00%)
Fair Value Inputs, Discount Rate	12.00%
Equity Method Investments [Member] \| Maximum \| Solar Spain [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	0.00%
Fair Value Inputs, Long-term Pre-tax Operating Margin, Percent	56.00%
Fair Value Inputs, Discount Rate	12.00%
Equity Method Investments [Member] \| Weighted Average \| Solar Spain [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	0.00%
Fair Value Inputs, Long-term Pre-tax Operating Margin, Percent	24.00%
Fair Value Inputs, Discount Rate	12.00%

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.

+ Details

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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- Definition

Percentage of assumed long-term growth in revenues, used as an input to measure fair value.

+ References

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- Definition

Long-term pre-tax operating income as a percentage of net sales, used as an input to measure fair value.

+ References

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