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Commitments And Contingencies (Roseland Contingent Consideration) (Narrative) (Details) (USD $)
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3 Months Ended |
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Mar. 31, 2015
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Oct. 23, 2012
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| Roseland Partners, L.L.C. [Member] |
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| Business Acquisition, Contingent Consideration [Line Items] |
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| Fair value of contingent consideration |
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$ 10,000,000 |
| Business acquisition, contingent cash payment |
900,000 |
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| Purchase accounting adjustments |
0 |
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| Completion/Start Of Certain Developments [Member] | Minimum [Member] |
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| Business Acquisition, Contingent Consideration [Line Items] |
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| Probability of occurrence |
92.00% |
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| Completion/Start Of Certain Developments [Member] | Maximum [Member] |
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| Business Acquisition, Contingent Consideration [Line Items] |
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| Probability of occurrence |
99.00% |
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| Obtaining Of Tax Credits/Grants [Member] |
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| Business Acquisition, Contingent Consideration [Line Items] |
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| Probability of occurrence |
50.00% |
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| Obtaining Of Tax Credits/Grants [Member] | Roseland Partners, L.L.C. [Member] |
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| Business Acquisition, Contingent Consideration [Line Items] |
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| Business acquisition, contingent cash payment |
$ 3,000,000 |
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