Summary of Significant Accounting Policies - Revenue Recognition/Account and Mortgage Receivable (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) mortgage_note_receivable	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($) mortgage_note_receivable
Deferred Revenue Arrangement [Line Items]
Straight line rent	$ 265	$ 95
Provision for bad debts	$ 221		$ 154
Number of mortgage note receivables | mortgage_note_receivable	1
Mortgage note receivable	$ 10,652		10,786
Amortization period	20 years
Other Liabilities [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 1,100		$ 800
Mortgage Receivable [Member]
Deferred Revenue Arrangement [Line Items]
Number of mortgage note receivables | mortgage_note_receivable	1		1
Mortgage note receivable	$ 10,800		$ 10,900