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Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands | Jan. 01, 2018 | Dec. 31, 2017
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Cumulative Effect of Accounting Change(1) | [1] |  | $ 0
Accounting Standards Update 2016-01 [Member] |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Cumulative Effect of Accounting Change(1) |  | $ (2,229) |
[1] | (1) The cumulative adjustment relates to the adoption of ASU No. 2016-01, "Recognition and Measurement of Financial Assets and Financial Liabilities" on January 1, 2018, for which the Company recorded an adjustment to Retained Earnings to reflect cumulative unrealized losses, net of tax, on available-for-sale equity securities previously recorded in Accumulated Other Comprehensive Income (Loss). See Note 3 for further information.

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