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Note 2 - Acquisitions - Components of Fair Value of Acquisitions and Allocation of Purchase Price For Acquisition of Piazza Rosa Group (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended | 12 Months Ended | 15 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2018 | Dec. 31, 2018 | Jun. 30, 2018
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  | $ 95,918 | $ 10,397 |  |  |
Goodwill, Ending Balance |  |  |  | 261,569 |  |  | $ 261,569 | $ 211,751
Piazza Rosa Group [Member] |  |  |  |  |  |  |  |
Total cash consideration | $ 10,056 |  |  |  |  |  | 10,056 |
Fair value of contingent consideration |  |  | $ 2,800 |  |  | $ 2,600 | 2,617 |
Fair value of contingent consideration |  |  |  |  |  |  | 2,617 |
Payments to Acquire Businesses, Net of Cash Acquired, Total | 10,056 | $ 900 | 10,100 |  |  |  | 12,673 |
Total |  |  |  |  |  |  | 2,617 |
Other acquired assets | 2,678 |  | 2,678 | 4,342 |  |  | 4,342 |
Other acquired assets |  |  |  |  |  |  | 1,664 |
Inventories | 637 |  | 637 | 635 |  |  | 635 |
Inventories |  |  |  |  |  |  | (2) |
Property, plant, & equipment | 5,005 |  | 5,005 | 5,563 |  |  | 5,563 |
Property, plant, & equipment |  |  |  |  |  |  | 558 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total | 4,087 |  | 4,087 | 3,472 |  |  | 3,472 |
Identifiable intangible assets |  |  |  |  |  |  | (615) |
Goodwill, Ending Balance | 6,218 | $ 7,100 | 6,218 | 7,076 |  | $ 7,100 | 7,076 |
Goodwill |  |  |  |  |  |  | 858 |
Liabilities assumed | (7,387) |  | (7,387) | (7,387) |  |  | (7,387) |
Liabilities assumed |  |  |  |  |  |  |  |
Deferred taxes | (1,182) |  | (1,182) | (1,028) |  |  | (1,028) |
Deferred taxes |  |  |  |  |  |  | 154 |
Total | $ 10,056 |  | $ 10,056 | $ 12,673 |  |  | 12,673 |
Total |  |  |  |  |  |  | $ 2,617 |

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