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Long Term Incentive Plan (Textual) (Details) (USD $)
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12 Months Ended | |||
|---|---|---|---|---|
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Jul. 11, 2012
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| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||||
| Equity compensation expense | $ 1,536,000 | $ 2,094,000 | $ 1,783,000 | |
| Long-term incentive plan, increase in available awards | 871,750 | |||
| Long term incentive plan available for future grant | 688,976 | 855,089 | 920,193 | |
| Grants issued under long term incentive plan | 25.00% | |||
| Total fair value of vested units | 1,400,000 | 2,200,000 | 1,900,000 | |
| Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $ 3,100,000 | $ 900,000 | $ 1,400,000 | |
| Weighted average period cost recognized | 3 years 0 months | |||