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Income Taxes Reconciliation of effective tax rate (Details) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract] |  |  |
Statutory Federal rate | 35.00% | 35.00% | 35.00%
Change in deferred tax asset valuation allowance reversal | (210.50%) | 0.00% | 0.00%
Change in deferred tax asset valuation allowance - federal tax rate change | (126.40%) | 0.00% | 0.00%
Increase (decrease) resulting from: |  |  |
State and local taxes, net | 4.70% | (17.40%) | 10.40%
Change in valuation allowance | (65.70%) | 14.50% | (86.40%)
Change in federal tax rate | 126.40% | 0.00% | 0.00%
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent | 29.20% | 0.00% | 0.00%
Foreign tax rate differential | 0.10% | (14.30%) | 17.90%
Meals & entertainment | 1.40% | (9.00%) | 11.60%
Alternative minimum tax | 3.60% | (6.30%) | 7.60%
Provision to return differences | (0.70%) | (4.50%) | 24.40%
Executive life insurance | 0.90% | (3.10%) | 2.40%
Captive insurance income | 0.30% | (3.00%) | 0.00%
Change in uncertain tax positions | 7.70% | 0.60% | 56.20%
Other items, net | (0.10%) | 1.10% | (4.90%)
Provision for income taxes | (194.10%) | (6.40%) | 74.20%

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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=65882285&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=65882285&loc=d3e32687-109319 + Details
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