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Income Taxes Reconciliation of effective tax rate (Details) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract] |  |
Statutory Federal rate | 21.00% | 35.00%
Change in deferred tax asset valuation allowance reversal | 0.00% | (210.50%)
Change in deferred tax asset valuation allowance - federal tax rate change | 0.00% | (126.40%)
Increase (decrease) resulting from: |  |
State and local taxes, net | 4.70% | 4.70%
Change in valuation allowance | 3.70% | (65.70%)
Change in federal tax rate | 0.00% | 126.40%
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent | (13.90%) | 29.20%
Meals & entertainment | 2.40% | 1.40%
Alternative minimum tax | 1.40% | 3.60%
Provision to return differences | (9.30%) | (0.70%)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent | 2.50% | 0.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent | (4.50%) | (1.90%)
Change in uncertain tax positions | (1.40%) | 7.70%
Other items, net | 2.90% | 3.10%
Provision for income taxes | 9.50% | (194.10%)

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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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