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Income Taxes (Narrative) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax Disclosure [Line Items] |  |  |  |
Federal tax rate |  |  | 21.00% | 35.00%
Provisional tax expense |  | $ 13,000,000 |  |
Net deferred tax assets | $ 2,300,000 |  |  |
One-time mandatory repatriation tax |  |  | $ 1,200,000 |
Valuation allowance | 6,720,000 | 6,870,000 | 6,720,000 | $ 6,870,000
Deferred tax liability |  |  | 1,100,000 |
Net tax impact |  |  | 10,700,000 |
Refundable carry forward |  |  | 1,100,000 |
Increase (decrease) to unrecognized tax interest |  |  | 430,000 | 203,000
Unrecognized tax interest | 9,500,000 | 9,100,000 | 9,500,000 | 9,100,000
Impact of effective tax rate if recognized | 4,700,000 | 3,100,000 | 4,700,000 | 3,100,000
Alternative minimum tax credit carry-forwards | 1,117,000 | $ 939,000 | 1,117,000 | $ 939,000
Domestic Tax Authority [Member] |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Alternative minimum tax credit carry-forwards | 11,700,000 |  | 11,700,000 |
United States [Member] |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Alternative minimum tax credit carry-forwards | 2,200,000 |  | 2,200,000 |
New Zealand [Member] |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Alternative minimum tax credit carry-forwards | 8,100,000 |  | 8,100,000 |
California [Member] |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Alternative minimum tax credit carry-forwards | 4,900,000 |  | 4,900,000 |
Hawaii [Member] |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Alternative minimum tax credit carry-forwards | 1,800,000 |  | 1,800,000 |
New York State [Member] |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Alternative minimum tax credit carry-forwards | 43,300,000 |  | 43,300,000 |
New York City [Member] |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Alternative minimum tax credit carry-forwards | 43,300,000 |  | 43,300,000 |
Minimum [Member] |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Uncertain tax position probable changes in next 12 months | 500,000 |  | 500,000 |
Maximum [Member] |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Uncertain tax position probable changes in next 12 months | $ 1,500,000 |  | $ 1,500,000 |

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