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Income Taxes (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Operating Loss Carryforwards [Line Items] |  |  |
Tax Cuts and Jobs Act of 2017, change in tax rate, deferred tax asset, expense | $ (300) | $ 9,600 |
U.S federal income tax rate | 21.00% |  |
State income taxes (benefit), net of federal tax benefit | $ 1,915 | (776) | $ 1,161
State income taxes (benefit), net of federal tax benefit (impact of REIT election), net of valuation allowance | 1,300 | 1,500 | 1,200
Valuation allowance | 21,333 | 22,577 |
Increase in valuation allowance | 1,300 |  |
Foreign operating losses carry forward | 78,600 |  |
State tax credits | 6,500 |  |
Deferred tax asset net of valuation allowance | 4,400 |  |
Unrecognized tax benefits, net | 4,400 |  |
Decrease in unrecognized tax benefits | 100 |  |
Recognized tax benefits that will reduce company's tax rate | 4,400 |  |
Interest and penalties recognized | 100 |  |
Accrued income tax examination penalties and interest |  | 100 |
Tax adjustment due to immaterial error correction | (14,117) | $ (17,958) | $ (7,904)
State and Local Jurisdiction |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Federal net operating loss carryforwards | 171,700 |  |
Domestic Country |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Federal net operating loss carryforwards | $ 43,100 |  |

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