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Acquisitions - Northern Empire (Details) - Northern Empire Resources Corp. $ in Thousands, shares in Millions | 1 Months Ended
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Oct. 31, 2018 USD ($) shares
Business Acquisition [Line Items] |
Purchase price | $ 73,593
Fair value of existing investment in Northern Empire | 7,257
Assets: |
Common shares issued (value) | 63,887
Transaction advisory fees and other acquisition costs | 2,449
Total assets acquired | 111,527
Liabilities: |
Total liabilities assumed | 37,934
Total assets acquired | $ 73,593
Common Stock |
Business Acquisition [Line Items] |
Common stock conversion ratio | 0.1850
Common shares issued (in shares) | shares | 12.1

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