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Noncontrolling Interests (Narrative) (Details) - USD ($) $ in Thousands |  |  |  | 1 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 07, 2020 | Jan. 21, 2019 | Jul. 19, 2017 | Mar. 31, 2019 | Dec. 31, 2019 | Apr. 02, 2015
Subsequent Event |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Payments for Repurchase of Redeemable Noncontrolling Interest | $ 10,000 |  |  |  |  |
Robtec |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Ownership percentage |  |  |  |  | 70.00% |
Robtec | Subsequent Event |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Ownership percentage | 100.00% |  |  |  |  |
Easyway |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Acquired ownership percentage |  | 30.00% | 5.00% |  | 100.00% | 65.00%
Value of voting rights acquired |  | $ 13,500 | $ 2,300 |  |  |
Purchase of noncontrolling interest |  |  |  | $ 2,500 |  |

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