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Accounting Policies (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
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New Accounting Pronouncements and Changes in Accounting Principles [Abstract] |  |
Right of use assets | $ 21,200 |
Lease liabilities | $ 21,181 |
ASU 2016-02 [Member] |  |
New Accounting Pronouncements and Changes in Accounting Principles [Abstract] |  |
Right of use assets |  | $ 20,700
Lease liabilities |  | $ 20,700

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