Commitments and Contingencies (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2016 USD ($) category tenant	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) category tenant	Jun. 30, 2015 USD ($)
Loss Contingencies [Line Items]
Number of tenant and building improvement categories | category	2		2
Collectibility of Tenant Reimbursements [Member]
Loss Contingencies [Line Items]
Reductions in reimbursement revenues	$ 0	$ 100,000	$ 0	$ 100,000
Tenant Audits and Disputes [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of tenants | tenant	1		1
Tenant Audits and Disputes [Member] | Pending Litigation [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Amount of potential loss	$ 0		$ 0
Tenant Audits and Disputes [Member] | Pending Litigation [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Amount of potential loss	1,800,000		$ 1,800,000
Non-Incremental Capital Expenditures [Member]
Loss Contingencies [Line Items]
Period for commitments for funding non-incremental capital expenditures			3 years
Potential obligations for tenant improvements	37,700,000		$ 37,700,000
Non-Incremental Capital Expenditures [Member] | Maximum [Member]
Loss Contingencies [Line Items]
Period for commitments for funding non-incremental capital expenditures			5 years
Incremental Capital Expenditures [Member]
Loss Contingencies [Line Items]
Potential obligations for tenant improvements	$ 29,500,000		$ 29,500,000