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Income Taxes (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Operating Loss Carryforwards [Line Items] |  |  |
Tax Cuts and Jobs Act of 2017, change in tax rate, deferred tax asset, expense | $ 9,600 |  |
U.S federal income tax rate | 35.00% |  |
State income taxes (benefit), net of federal tax benefit | $ (776) | $ 1,161 | $ (322)
State income taxes (benefit), net of federal tax benefit (impact of REIT election), net of valuation allowance | 1,500 | 1,200 | 900
Valuation allowance | (22,577) | (17,312) |
Increase in valuation allowance | 5,300 |  |
Accumulated undistributed earnings invested | 2,600 |  |
Additional taxes (net of foreign tax credits) | 100 |  |
Foreign operating losses carry forward | 104,600 |  |
State tax credits | 5,800 |  |
Deferred tax asset net of valuation allowance | 4,200 |  |
Unrecognized tax benefits, net | 4,300 |  |
Decrease in unrecognized tax benefits | 200 |  |
Recognized tax benefits that will reduce company's tax rate | 4,300 |  |
Interest and penalties recognized | 100 |  |
Accrued income tax examination penalties and interest |  | 100 |
Tax adjustment due to immaterial error correction | (17,958) | $ (7,904) | $ (7,389)
State and Local Jurisdiction |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Federal net operating loss carryforwards | 189,700 |  |
Domestic Country |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Federal net operating loss carryforwards | 42,700 |  |
Restatement Adjustment | Prior Year Misstatement |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Tax adjustment due to immaterial error correction | $ 2,700 |  |

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