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