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Consolidated Statements of Cash Flows (Parenthetical) - USD ($) | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
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Statement of Cash Flows [Abstract] |  |  |
Cash included in current assets of discontinued operations | $ 8,134,000 | $ 3,700,000 | $ 9,100,000

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