Revenue Recognition	9 Months Ended
Sep. 30, 2018
Revenue Recognition [Abstract]
Revenue Recognition	Revenue Recognition We recognize rental income from operating leases that contain fixed contractual rent changes on a straight line basis over the term of the lease agreements. Certain of our leases with government tenants provide the tenant the right to terminate before the lease expiration date if the legislature or other funding authority does not appropriate the funding necessary for the government tenant to meet its lease obligations; we have determined the fixed non-cancelable lease term of these leases to be the full term of the lease because we believe the occurrence of early terminations to be remote contingencies based on both our historical experience and our assessments of the likelihood of lease cancellation on a separate lease basis. We increased rental income to record revenue on a straight line basis by $1,990 and $711 for the three months ended September 30, 2018 and 2017, respectively, and $7,825 and $3,115 for the nine months ended September 30, 2018 and 2017, respectively. Rents receivable include $33,978 (including $1,819 related to properties held for sale) and $27,267 of straight line rent receivables, net of allowance for doubtful accounts of $1,755 (including $976 related to properties held for sale) and $1,503 at September 30, 2018 and December 31, 2017, respectively.

Revenue Recognition

We recognize rental income from operating leases that contain fixed contractual rent changes on a straight line basis over the term of the lease agreements. Certain of our leases with government tenants provide the tenant the right to terminate before the lease expiration date if the legislature or other funding authority does not appropriate the funding necessary for the government tenant to meet its lease obligations; we have determined the fixed non-cancelable lease term of these leases to be the full term of the lease because we believe the occurrence of early terminations to be remote contingencies based on both our historical experience and our assessments of the likelihood of lease cancellation on a separate lease basis.

We increased rental income to record revenue on a straight line basis by $1,990 and $711 for the three months ended September 30, 2018 and 2017, respectively, and $7,825 and $3,115 for the nine months ended September 30, 2018 and 2017, respectively. Rents receivable include $33,978 (including $1,819 related to properties held for sale) and $27,267 of straight line rent receivables, net of allowance for doubtful accounts of $1,755 (including $976 related to properties held for sale) and $1,503 at September 30, 2018 and December 31, 2017, respectively.