Stock-based Compensation (Tables) |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2016 |
Dec. 31, 2015 |
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| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | ollowing is a summary of activity under the Company's unit option plans for the fiscal year ended December 31, 2014:
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| Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] | Following is a summary of activity under the Company's restricted unit plan for the year ended December 31, 2014:
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