Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Consolidated Balance Sheets
Acquired real estate leases, accumulated amortization	$ 109,771	$ 112,441
Tenant rent receivables, allowance for doubtful accounts	250	100
Straight-line rent receivable, allowance for doubtful accounts	50	50
Office computers and furniture, accumulated depreciation	1,420	1,277
Deferred leasing commissions, accumulated amortization	22,276	18,301
Term loan payable, unamortized financing costs	5,099	4,783
Series A & Series B Senior notes, unamortized financing costs	1,308	1,308
Acquired unfavorable real estate leases, accumulated amortization	$ 7,638	$ 8,422
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	180,000,000	180,000,000
Common stock, shares issued (in shares)	107,231,155	107,231,155
Common stock, shares outstanding (in shares)	107,231,155	107,231,155