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Income Taxes (Details) (USD $)
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12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Income Tax Contingency [Line Items] | |||
| Valuation allowance | $ 1,952,761 | $ 2,827,444 | |
| Interest rate swaps | 1,687,586 | 2,559,448 | |
| Net operating losses | 345,350 | 267,996 | |
| Unrecognized tax benefits | 9,200,000 | 4,900,000 | 1,400,000 |
| Unrecognized tax benefits that would impact effective tax rate | 5,500,000 | 3,400,000 | |
| Energy efficiency | 9,524,077 | 1,225,197 | |
| Earnings with no repatriation tax | 24,400,000 | ||
| Amount of interest and penalties related to uncertain tax positions | (100,000) | 300,000 | (900,000) |
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Federal
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| Income Tax Contingency [Line Items] | |||
| Net operating loss, related to excess stock options | 5,000,000 | ||
| Energy efficiency | 5,400,000 | ||
| Federal tax credit relating to excess stock options | 100,000 | ||
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State
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| Income Tax Contingency [Line Items] | |||
| Net operating losses | 265,175 | 267,996 | |
| Energy efficiency | $ 8,500,000 | ||
| X | ||||||||||
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- Definition
Deferred Tax Assets, Derivative Instruments, Net No definition available.
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- Definition
Deferred Tax Assets, Tax Credit Carryforwards, Excess Stock Options No definition available.
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- Definition
Earnings with No Repatriation Tax No definition available.
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| X | ||||||||||
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- Definition
Net Operating Loss, Related to Excess Stock Options No definition available.
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| X | ||||||||||
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The tax effect as of the balance sheet date of the amount of future tax deductions arising from all unused tax credit carryforwards which have been reduced by a valuation allowance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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| X | ||||||||||
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- Definition
Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The net amount of all increases and decreases in unrecognized tax benefits for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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