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Income Taxes (Components of Income Before Taxes and of Income Tax Expense) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Taxes |  |  |
U.S. | $ 21,634 | $ 11,319 | $ 10,433
Non U.S. | 2,312 | 1,456 | 1,307
Income before income taxes | 23,946 | 12,775 | 11,740
Federal |  |  |
Current | 324 | (208) | 109
Deferred | 8,807 | 4,871 | 3,797
Total | 9,131 | 4,663 | 3,906
State |  |  |
Current | 14 | 13 | 179
Deferred | 292 | 1,163 | 164
Total | 306 | 1,176 | 343
Foreign |  |  |
Current | 440 | 476 | 311
Total | 440 | 476 | 311
Total |  |  |
Current | 778 | 281 | 599
Deferred | 9,099 | 6,034 | 3,961
Total | 9,877 | 6,315 | 4,560
Reconciliation of the federal income tax expense at the statutory rate to the effective income tax expense |  |  |
Statutory federal income tax expense | 8,142 | 4,343 | 3,992
State taxes, net of federal benefit | 202 | 776 | 118
Foreign tax paid | 440 | 476 | 101
Tax consequences of the sale of engines to WMES |  | (306) | (36)
Uncertain tax positions | (40) | (195) | (101)
Permanent differences-nondeductible executive compensation | 1,201 | 1,117 | 768
Permanent differences and other | (68) | 104 | (282)
Total | $ 9,877 | $ 6,315 | $ 4,560
Reconciliation of the federal income tax expense |  |  |
Statutory federal income tax expense (as a percent) | 34.00% | 34.00% | 34.00%
State taxes, net of federal benefit (as a percent) | 0.80% | 6.10% | 1.00%
Foreign tax paid (as a percent) | 1.80% | 3.70% | 0.90%
Tax consequences of the sale of engines to WMES (as a percent) |  | (2.40%) | (0.30%)
Uncertain tax positions (as a percent) | (0.10%) | (1.50%) | (0.90%)
Permanent differences-162(m) (as a percent) | 5.00% | 8.70% | 6.50%
Permanent differences and other (as a percent) | (0.30%) | 0.80% | (2.40%)
Effective income tax expense (benefit) (as a percent) | 41.20% | 49.40% | 38.80%

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- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from 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 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 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 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit). + 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 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 Reference 3: 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 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in income tax contingencies. Including, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies. + 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=65882285&loc=d3e32687-109319 Reference 2: 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 + Details
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- Definition Amount of state and local current and deferred income tax expense (benefit) attributable to continuing operations. + References Reference 1: 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)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 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.7) -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 9 -Subparagraph (a)-(b) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 + Details
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- Definition Represents the portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to permanent differences and other items under enacted tax laws. + References No definition available. + Details
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