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Long Term Retention Plan ("LTRP") (Long Term Retention Plans Accrued Compensation Expense) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015
LTRP 2009 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Long term retention plan | $ 33 | $ (12)
LTRP 2010 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Long term retention plan | 62 | 120
LTRP 2011 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Long term retention plan | 96 | 142
LTRP 2012 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Long term retention plan | 130 | 185
LTRP 2013 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Long term retention plan | 413 | 842
LTRP 2014 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Long term retention plan | 505 | $ 1,059
LTRP 2015 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Long term retention plan | $ 893 |

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- Definition Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + References No definition available. + Details
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