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Income Taxes Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2018 | Jun. 30, 2018 | Dec. 31, 2017
Computed expected tax expense | 21.00% | 21.00% | 21.00% | 28.10% | 35.00%
Deferred Tax Assets, Valuation Allowance | $ 473 | $ 415 |  |  |
Income Taxes Paid | 63,692 | 62,005 |  | $ 60,382 |
Unrecognized Tax Benefits | 10,112 | 10,495 |  | 10,227 |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 9,434 | 9,892 |  |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 1,565 | 1,514 |  |  |
Income Tax penalties and interest expense (or benefits) included in income tax provision | 38 | $ 128 |  | $ 165 |
Internal Revenue Service (IRS) [Member] |  |  |  |  |
Operating Loss Carryforwards | 8,108 |  |  |  |
State and Local Jurisdiction [Member] |  |  |  |  |
Operating Loss Carryforwards | 532 |  |  |  |
Minimum [Member] |  |  |  |  |
Expiration of statutes of limitations impact on UTB balance | 3,500 |  |  |  |
Maximum [Member] |  |  |  |  |
Expiration of statutes of limitations impact on UTB balance | $ 4,500 |  |  |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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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=116825942&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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