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Acquisitions (Details) - USD ($) $ in Thousands |  |  |  | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Nov. 01, 2018 | Feb. 01, 2018 | Nov. 28, 2017 | Mar. 31, 2019 | Mar. 31, 2018 | Sep. 30, 2018 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |  |  |  |
Payment to acquire business, net of cash acquired |  |  |  | $ 11,525 | $ 119,689 |  |
Percentage of ownership sold |  |  |  |  |  |  | 51.00%
Proceeds from sale of ownership interest |  |  |  | 8,254 | $ 0 |  |
Loss on sale of ownership interest |  |  |  | 4,465 |  |  |
Frost Converting Systems |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percentage of ownership acquired | 80.00% |  |  |  |  |  |
Payment to acquire business, net of cash acquired | $ 7,183 |  |  |  |  |  |
Memorialization Business |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Payment to acquire business, net of cash acquired |  |  |  | $ 3,094 |  |  |
Star Granite Bronze International, Inc |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Payment to acquire business, net of cash acquired |  | $ 30,961 |  |  |  |  |
Total purchase price |  | 35,961 |  |  |  |  |
Value of common stock issued in acquisition |  | 5,000 |  |  |  |  |
Annual sales of acquired entity, last annual period |  | $ 31,000 |  |  |  |  |
Compass Engineering Group, Inc |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Payment to acquire business, net of cash acquired |  |  | $ 51,887 |  |  |  |
Annual sales of acquired entity, last annual period |  |  | $ 24,000 |  |  |  |
Additional Acquisitions |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Payment to acquire business, net of cash acquired |  |  |  |  |  | $ 39,465 |

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