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Accounts Receivable and Credit Losses (Classification of Accounts Receivable) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019
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Accounts Receivable, after Allowance for Credit Loss, Current [Abstract] |  |  |  |  |  |
Trade receivables, current - Gross | $ 99,811 |  |  |  |  |
Trade receivables, current - Allowance | (11,298) |  |  |  |  |
Trade receivables, current - Net | 88,513 |  |  |  |  |
Financing Receivable, after Allowance for Credit Loss, Current [Abstract] |  |  |  |  |  |
Financing receivables, current - Gross | 6,830 |  |  |  |  |
Financing receivables, current - Allowance | (4,292) |  |  |  |  |
Financing receivables, current - Net | 2,538 |  |  |  |  |
Accounts Receivable, after Allowance for Credit Loss [Abstract] |  |  |  |  |  |
Accounts receivable, current - Gross | 106,641 |  |  |  |  |
Accounts receivable, current - Allowance | (15,590) |  |  |  |  |
Accounts receivable, current - Net | 91,051 |  | $ 87,042 | $ 93,394 |  |
Financing Receivable, after Allowance for Credit Loss, Noncurrent [Abstract] |  |  |  |  |  |
Financing receivables, noncurrent - Gross | 41,165 |  |  |  |  |
Financing receivables, noncurrent - Allowance | (13,063) |  |  |  |  |
Financing receivables, noncurrent - Net | 28,102 |  |  |  |  |
Financing Receivable, after Allowance for Credit Loss [Abstract] |  |  |  |  |  |
Total | 47,995 |  | 50,025 | 50,215 |  |
Total Financing receivables - Allowance | (17,355) | $ (16,815) | $ (15,690) | $ (13,873) | $ (9,578) | $ (6,289)
Total Financing receivables - Net | $ 30,640 |  |  |  |  |

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