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Basis of Presentation - Summary of Revenue Earned by Reportable Segments (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Segment Reporting Revenue Reconciling Item [Line Items] |  |
Base rent | $ 95,343 |
Straight-line rent | 5,205 |
Point of sale | 5,812 |
Total rents | 106,360 | $ 103,332
Tenant reimbursements | 19,849 | 18,535
Termination fees | 550 | 1,673
Third party management fees, labor reimbursement and leasing | 7,674 | 6,485
Other | 1,925 | 895
Total revenue | 136,358 | 130,920
Philadelphia CBD [Member] |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |
Base rent | 39,175 |
Straight-line rent | 4,339 |
Point of sale | 5,341 |
Total rents | 48,855 |
Tenant reimbursements | 12,366 |
Termination fees | 47 |
Third party management fees, labor reimbursement and leasing | 212 |
Other | 1,122 |
Total revenue | 62,602 |
Pennsylvania Suburbs [Member] |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |
Base rent | 29,894 |
Straight-line rent | 499 |
Point of sale | 48 |
Total rents | 30,441 |
Tenant reimbursements | 3,921 |
Termination fees | 434 |
Third party management fees, labor reimbursement and leasing | 8 |
Other | 78 |
Total revenue | 34,882 |
Metropolitan Washington, D.C. [Member] |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |
Base rent | 20,079 |
Straight-line rent | 208 |
Point of sale | 240 |
Total rents | 20,527 |
Tenant reimbursements | 928 |
Termination fees | 69 |
Third party management fees, labor reimbursement and leasing | 1,465 |
Other | 70 |
Total revenue | 23,059 |
Austin, Texas [Member] |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |
Base rent | 4,485 |
Straight-line rent | 256 |
Point of sale | 122 |
Total rents | 4,863 |
Tenant reimbursements | 1,981 |
Third party management fees, labor reimbursement and leasing | 1,501 |
Other | 19 |
Total revenue | 8,364 |
Other [Member] |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |
Base rent | 2,196 |
Straight-line rent | 18 |
Point of sale | 61 |
Total rents | 2,275 |
Tenant reimbursements | 765 |
Third party management fees, labor reimbursement and leasing | 3,095 |
Other | 6 |
Total revenue | 6,141 |
Corporate [Member] |  |
Segment Reporting Revenue Reconciling Item [Line Items] |  |
Base rent | (486) |
Straight-line rent | (115) |
Total rents | (601) |
Tenant reimbursements | (112) |
Third party management fees, labor reimbursement and leasing | 1,393 |
Other | 630 |
Total revenue | $ 1,310 | $ 1,969

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- Definition Point of sale revenue. + References No definition available. + Details
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- Definition Revenue from base rent. + References No definition available. + Details
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- Definition Gain (loss) related to the termination of a contract between the parties. The termination may be due to many causes including early termination of a lease by a lessee, a breach of contract by one party, or a failure to perform. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition Revenue, comprised of base and incentive revenue derived from the management of joint ventures, managing third-party properties, or another entity's operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The total amount of lease revenue recognized for the period for which the lessee was obligated under leasing arrangements regardless of any other events or conditions. This amount excludes contingent revenue and sublease revenue. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e39896-112707 + Details
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- Definition Other real estate revenue not otherwise specified in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The aggregate revenue from real estate operations during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Difference between actual rental income due and rental income recognized on a straight-line basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition In accordance with the provisions of their lease agreement, this element represents allowable charges due a landlord from its tenant. In retail store and office building leases, for example, tenant reimbursements may cover items such as taxes, utilities, and common area expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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