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Income Taxes Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2018 | Dec. 31, 2017 | Mar. 31, 2017 | Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2018 | Jun. 30, 2018 | Dec. 31, 2017
Effective Tax Rate | 24.40% |  | 32.10% | (2.90%) | 32.50% |  |  |
PROVISION/ (BENEFIT) FOR INCOME TAXES | $ 23,317 |  | $ 28,451 | $ (8,287) | $ 87,258 |  |  |
U.S Federal Statutory Income Tax Rate |  |  |  |  |  |  |  | 35.00%
Income Taxes Paid |  |  |  | 48,301 | 66,683 |  |  |
Unrecognized Tax Benefits | 9,914 |  |  | 9,914 |  |  |  |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 9,006 |  |  | 9,006 |  |  |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 1,249 |  | $ 1,083 | 1,249 | $ 1,083 |  |  |
Minimum [Member] |  |  |  |  |  |  |  |
Expiration of statutes of limitations impact on UTB balance | 500 |  |  | 500 |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |
Expiration of statutes of limitations impact on UTB balance | 1,500 |  |  | $ 1,500 |  |  |  |
Scenario, Forecast [Member] |  |  |  |  |  |  |  |
U.S Federal Statutory Income Tax Rate |  |  |  |  |  | 21.00% | 28.00% |
Tax Cuts and Jobs Act [Member] |  |  |  |  |  |  |  |
PROVISION/ (BENEFIT) FOR INCOME TAXES | (8,746) | $ (96,766) |  |  |  |  |  |
Measurement period adjustment of income tax benefit recorded in prior period | $ (800) |  |  |  |  |  |  |

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- Definition Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 2: http://www.xbrl.org/2003/role/presentationRef -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 3: http://www.xbrl.org/2003/role/presentationRef -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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