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Income Taxes (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2017 | Dec. 31, 2018 | Jun. 30, 2018
Income Tax Authority [Line Items] |  |  |  |
Federal statutory income tax rate |  | 35.00% |  |
Federal [Member] |  |  |  |
Income Tax Authority [Line Items] |  |  |  |
Prepaid income taxes |  |  | $ 0.5 | $ 3.6
State and Local [Member] |  |  |  |
Income Tax Authority [Line Items] |  |  |  |
Prepaid income taxes |  |  | $ 0.4 | $ 0.9
Scenario, Forecast [Member] |  |  |  |
Income Tax Authority [Line Items] |  |  |  |
Federal statutory income tax rate | 21.00% |  |  |

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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