Document And Entity Information [Abstract] Document and entity information. Statement [Table] Statement [Line Items] Document Type Amendment Flag Document Period End Date Document Fiscal Period Focus Document Fiscal Year Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Consolidated Balance Sheets [Abstract] Real Estate Investment Property, at Cost [Abstract] Investments in real estate: Real Estate Investment Property, at Cost Rental properties Accumulated depreciation Real Estate Investment Property, Accumulated Depreciation Rental properties, net Real Estate Investment Property, Net Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and cash equivalents Accounts Receivable, Net Accounts receivable, net Deferred Leasing and Financing Costs Deferred costs, net of accumulated amortization of $1,751 and $1,918 as of September 30, 2012 and December 31, 2011, respectively This element represents costs incurred by the lessor that are (a) costs to originate a lease incurred in transactions with independent third parties that (i) result directly from and are essential to acquire that lease and (ii) would not have been incurred had that leasing transaction not occurred and (b) certain costs directly related to specified activities performed by the lessor for that lease. Those activities are: evaluating the prospective lessee's financial condition; evaluating and recording guarantees, collateral, and other security arrangements; negotiating lease terms; preparing and processing lease documents; and closing the transaction. This element is net of accumulated amortization, combined with, for an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain. Prepaid Expense and Other Assets Prepaid expenses and other assets Assets Total assets Liabilities [Abstract] Liabilities: Notes Payable Note payable and line of credit Note payable and line of credit Accounts Payable and Accrued Liabilities Accounts payable and other liabilities Prepaid Rent Prepaid rent Liabilities Total liabilities Commitments and Contingencies Commitments and contingent liabilities (Note 6) Partners' Capital [Abstract] Partners' Equity (Deficit): General Partners' Capital Account General Partner Limited partners, 65,819 limited partnership units outstanding as of September 30, 2012 and December 31, 2011 Limited Partners' Capital Account Partners' Capital Balance (deficit) Balance (deficit) Total partners' equity Liabilities and Equity Total liabilities and partners' equity Accumulated Amortization Deferred Leasing And Financing Costs Accumulated amortization on deferred costs For an unclassified balance sheet, the accumulated amortization, as of the reporting date, which represents the periodic charge to earnings of initial direct costs which have been deferred and are being allocated over the lease term in proportion to the recognition of rental income, combined with, for an unclassified balance sheet, the accumulated amortization, as of the reporting date, representing the periodic charge to earnings of deferred costs which are associated with debt obligations existing as of the end of the period. Limited Partners' Capital Account, Units Outstanding Units outstanding Limited partners, limited partnership units outstanding Consolidated Statements of Operations [Abstract] Revenues [Abstract] Operating revenue Operating Leases, Income Statement, Lease Revenue Rental revenue and other Tenant Reimbursements Tenant reimbursements Real Estate Revenue, Net Total operating revenue Costs And Expenses [Abstract] Operating expenses Cost of Real Estate Revenue Property operating expenses Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization General and Administrative Expense General and administrative Operating Expenses Total operating expenses Operating Income (Loss) Operating income Interest Expense Interest expense (including amortization of loan fees) Net Income (Loss) Attributable to Parent Net loss Net Loss Net income (loss) Basic and Diluted Net Loss per Limited Partnership Unit Basic and diluted net loss per limited partnership unit The amount of net income or loss for the period per each limited partnership unit outstanding during the reporting period. Weighted Average Limited Partnership Units Outstanding, Basic Weighted average number of limited partnership units outstanding during each period Consolidated Statement of Partners' Equity [Abstract] Related Party Transactions, by Related Party [Axis] Related Party [Domain] General Partner [Member] General Partner [Member] General Partner Limited Partner [Member] Limited Partner [Member] Limited Partners Consolidated Statements of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash provided by operating activities: Amortization of Financing Costs Amortization of loan fees, included in interest expense Increase (Decrease) in Operating Capital [Abstract] Changes in certain assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Deferred Charges Deferred costs Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other assets Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable and other liabilities Increase (Decrease) in Prepaid Rent Prepaid rent Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Payments for Capital Improvements Additions to real estate investments Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Repayments of Notes Payable Note payable principal payments Net Cash Provided by (Used in) Financing Activities Net cash used in financing activities Cash and Cash Equivalents, Period Increase (Decrease) Net increase in cash and cash equivalents Supplemental Cash Flow Information [Abstract] Supplemental disclosure of cash flow information: Interest Paid Cash paid for interest Supplemental Disclosure Of Non-cash Operating Activities [Abstract] Supplemental disclosure of non-cash operating activities: Supplemental disclosure of non-cash operating activities. Write-Off Of Fully Depreciated Rental Property Assets Write-off of fully depreciated rental property assets Write-off of fully depreciated rental property assets. Write-Off Of Fully Amortized Deferred Costs Write-off of fully amortized deferred costs Write-off of fully amortized deferred costs. Organization [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] ORGANIZATION Significant Accounting Policies [Abstract] Significant Accounting Policies [Text Block] SIGNIFICANT ACCOUNTING POLICIES Real Estate Disclosure [Text Block] INVESTMENTS IN REAL ESTATE Note Payable and Line of Credit [Abstract] Debt Disclosure [Text Block] NOTE PAYABLE AND LINE OF CREDIT Related Party Transactions Disclosure [Text Block] RELATED PARTY TRANSACTIONS Commitments and Contingent Liabilities [Abstract] Commitments and Contingencies Disclosure [Text Block] COMMITMENTS AND CONTINGENT LIABILITIES Assets [Abstract] Assets Liabilities and Equity [Abstract] Liabilities and Partners' Equity (Deficit) Rental Properties [Policy Text Block] Rental Properties Rental properties. Basis of Presentation and Significant Accounting Policies [Text Block] Basis of Presentation Use of Estimates, Policy [Policy Text Block] Use of Estimates Fair Value Measurement, Policy [Policy Text Block] Fair Value of Investments Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents Deferred Charges, Policy [Policy Text Block] Deferred Costs Income Tax, Policy [Policy Text Block] Income Taxes Concentration Risk, Credit Risk, Policy [Policy Text Block] Concentration Risk Organization (Textual) [Abstract] Organization. Organization (Textual) [Abstract] Number Of Employees In Partnership Number of employees in the partnership. Number of employees in the partnership Net Income Other Than Net Income From Operations Allocated To Partners Net income other than net income from operations allocated to partners. Net income other than net income from operations allocated to partners Distribution Of Cash From Other Sources Distribution of cash from other sources. Distribution of cash from other sources Partner Type [Axis] Partner Type of Partners' Capital Account, Name [Domain] Net Loss Income Per Unit [Table Text Block] Net (loss) income per Unit Net (loss) income per Unit. Furniture and Fixtures [Member] Furniture and equipment [Member] Significant Accounting Policies (Textual) [Abstract] Significant Accounting Policies (Textual) [Abstract] Significant accounting policies. Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Range [Axis] Range [Domain] Maximum [Member] Maximum [Member] Minimum [Member] Minimum [Member] Property, Plant and Equipment [Line Items] Land [Member] Land [Member] Building [Member] Buildings [Member] Building and Building Improvements [Member] Building and tenant improvements [Member] Investments In Real Estate (Textual) [Abstract] Investments in real estate. Investments In Real Estate (Textual) [Abstract] Schedule of Maturities of Long-term Debt [Table Text Block] Annual maturities on the Partnership's notes payable Schedule of Related Party Transactions [Table Text Block] Partnership continues to engage Glenborough LLC to perform services Related Party Transactions (Textual) [Abstract] Related Party Transactions (Textual) [Abstract] Related party transactions. Percentage Of Sale Fee Of Properties Sales fee for all properties Percentage of sale fee of properties. Financing Servicing Fee Of Gross Loan Amount Financing service fee for the gross loan amount Financing servicing fee of gross loan amount. Development Fee Of Hard Costs Of Development Project Development fee of hard costs of development project. Development fee of hard costs of development project Commitments And Contingent Liabilities (Textual) [Abstract] Commitments and contingent liabilities. Commitments And Contingent Liabilities (Textual) [Abstract] Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate Fixed interest rate Debt Instrument, Maturity Date Maturity date Debt Instrument, Convertible, Remaining Discount Amortization Period Amortization period Allocation Of Net Income And Net Losses From Operations To Partner Allocation of net income and net losses from operations Allocation of net income and net losses from operations to partner. Additional Cumulative Non Compounded Percentage Return To Be Used Under Option Two Additional cumulative non-compounded percentage return to be used under option two Additional cumulative non-compounded percentage return to be used under option two. Ratio Of Limited Partners To General Partners Ratio of limited partners to general partners. Ratio of limited partners to general partners Percentage Of Cash Other Than Cash From Operations To Be Distributed To Partner Under Option One Percentage of cash other than cash from operations to be distributed to partner under option one Percentage of cash other than cash from operations to be distributed to partner under option one. Percentage Of Cash Other Than Cash From Operations To Be Distributed To Partner Under Option Two Percentage of cash other than cash from operations to be distributed to partner under option two Percentage of cash other than cash from operations to be distributed to partner under option two. Annual Cumulative Non Compounded Return Percentage On Adjusted Invested Capital Annual cumulative non-compounded return percentage on Adjusted Invested Capital Annual cumulative non-compounded return percentage on adjusted invested capital. Percentage Of Cash Other Than Cash From Operations To Be Distributed To Partner Under Option Three Percentage of cash other than cash from operations to be distributed to partner under option three Percentage of cash other than cash from operations to be distributed to partner under option three. Percentage Of Cash Distribution From Sales And Refinancing To Be Considered Under Option Three Percentage of cash distribution from sales and refinancing to be considered under option three Percentage of cash distribution from sales and refinancing to be considered under option three. Percentage Of Cash Other Than Cash From Operations To Be Distributed To Partner Under Option Four Percentage of cash other than cash from operations to be distributed to partner under option four. Percentage of cash other than cash from operations to be distributed to partner under option four Net income (loss), General Partners Net Income (Loss) Allocated to General Partners Net income (loss), Limited Partners Net Income (Loss) Allocated to Limited Partners Useful life of building and improvements (all) Property, Plant and Equipment, Useful Life Revenue Recognition, Policy [Policy Text Block] Revenues Earnings Per Share, Policy [Policy Text Block] Net (Loss) Income Per Limited Partnership Unit Number Of Office Properties Number of office properties. Number of office properties Number Of Retail Properties Number of retail properties. Number of Retail properties Components Of Rental Properties [Table Text Block] Components of rental properties. Components of rental properties Components Of Rental Properties [Abstract] Components of Rental Properties Components of rental properties. Rental revenue from two major tenants Entity-Wide Revenue, Major Customer, Percentage Rental Properties Rental Properties Schedule of Debt [Table Text Block] Notes payable Long-term Debt, Maturities, Repayments of Principal in Year Two 2013 Long-term Debt, Maturities, Repayments of Principal in Year Three 2014 Long-term Debt, Maturities, Repayments of Principal in Year Four 2015 Long-term Debt, Maturities, Repayments of Principal in Year Five 2016 Long-term Debt Total Debt Instrument, Periodic Payment Monthly principal and interest payments Debt Instruments [Abstract] Note Payable and Line of Credit Maturities of Long-term Debt [Abstract] Annual maturities on the Partnership's notes payable Accrued Sales Commission, Current Commissions payable to General Partner Percentage Of Cumulative Noncompounded Return On Adjusted Invested Capital Percentage of cumulative non-compounded return on adjusted invested capital. Percentage of cumulative non-compounded return on adjusted invested capital Property Management Fees Related Party Included In Property Operating Expense Property management fees of 2.5% of gross rental revenue which were included in property operating expenses in the accompanying consolidated statements of operations Property management fees related party included in property operating expense. Construction Services Fees Related Party Capitalized Construction services fees which were capitalized and included in rental properties on the accompanying consolidated balance sheets Construction services fees related party capitalized. Asset And Partnership Management Fee Related Party Included In General And Administrative Expenses An asset and Partnership management fee which was included in general and administrative expenses in the accompanying consolidated statements of operations Asset and partnership management fee related party included in general and administrative expenses. Leasing Services Fees Related Party Included In Deferred Costs Leasing services fees which were included in deferred costs on the accompanying consolidated balance sheets Leasing services fees related party included in deferred costs. Sales Fee Related Party A sales fee of 1% for all properties, which were included in net gain on sale of property Sales fee related party. Financing Services Fee Related Party Included In Deferred Costs A financing services fee of 1% of the gross loan amount which is included in deferred costs on the accompanying consolidated balance sheets Financing services fee related party included in the deferred costs. Data Processing Fees Related Party Included In Property Operating Expenses Data processing fees which were included in property operating expenses in the accompanying consolidated statements of operations Data processing fees related party included in property operating expenses. Engineering Fees Related Party Included In Property Operating Expenses Engineering fees which were included in property operating expenses in the accompanying consolidated statements of operations Engineering fees related party included in property operating expenses. Glenborough Property Partners [Member] Glenborough Property Partners [Member] Glenborough property partners. Related Party Tax Expense [Abstract] Partnership continues to engage Glenborough LLC to perform services Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Line Items] Units of partnership interest amount Units of Partnership Interest, Amount Ownership percentage of noncontrolling interest Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Investments in Real Estate [Abstract] Minimum Amount To Be Allocated To Partners From Net Income Other Than Net Income From Operations Minimum amount to be allocated to partners from net income other than net income from operations Minimum amount to be allocated to partners from net income other than net income from operations. Property Plant And Equipment Useful Life Tenant Improvements Useful life of Tenant improvements Property plant and equipment useful life tenant improvements. Related Party Transactions [Abstract] Commitments and Contingent Liabilities [Table] Commitments and contingent liabilities. Commitments and Contingent Liabilities [Line Items] Commitments and contingent liabilities Organization [Table] Organization. Organization [Line Items] Organization. Development Fee Related Party Included In Construction In Progress And Or Rental Properties A development fee equal to 5% of the hard costs of the development project, excluding the cost of the land, which would be included in construction in progress and/or rental properties on the accompanying consolidated balance sheets, the development fee and the general contractor's fee shall not exceed 11.5%, in the aggregate, of the hard costs of the development fee project Development fee related party included in construction in progress and /or rental properties. Proceeds from Lines of Credit Draws on line of credit Payment Of Deferred Loan Fees Payment of deferred loan fees Payment of deferred loan fees. Earnings Per Unit [Abstract] Net (loss) income per Unit Loss Allocation [Abstract] Loss allocation. Loss allocation Additional Cumulative Non Compounded Returns One Additional cumulative non compounded returns one Additional cumulative non compounded returns one. Additional Cumulative Non Compounded Returns Two Additional cumulative non compounded returns two. Additional cumulative non compounded returns two Additional Cumulative Non Compounded Returns Three Additional cumulative non compounded returns three. Additional cumulative non compounded returns three Debt Instrument, Interest Rate Terms Line of facility, Interest rate terms Debt Instrument, Basis Spread on Variable Rate Line of facility, Interest rate Line of Credit Facility, Maximum Borrowing Capacity Total availability of line of credit Number Of Libor Days Used To Calculate Debt Instrument Variable Interest Rate Line of credit, Maturity period Number of LIBOR days used to calculate debt instrument variable interest rate. Note Payable [Member] Note Payable [Member] Note payable. Schedule of Short-term Debt [Table]