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Schedule of Acquisition Purchase Price Allocation (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016 | Jan. 29, 2016
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill | $ 105,655 | $ 105,655 |
Initial Montana Acquisition [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Cash and cash equivalents |  |  | $ 1,700
Property and equivalents |  |  | 2,350
Intangible assets |  |  | 14,400
Goodwill |  |  | 1,680
Total acquired assets |  |  | $ 20,130

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