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1. Significant Accounting Policies Details (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Other assets | $ 47,852 | $ 64,618
Restricted investments | 4,560 | 4,210
Adjustments for New Accounting Pronouncement [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Other assets |  | 1,800
Restricted investments | $ 2,000 | $ 1,400

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