CPPT Darien LLC [Member] CPPT Darien (in dollars per share) Represents information pertaining to CPPT Darien LLC. Area of Land Area of medical office building (in square feet) Area of property (in square feet) Clarion Partners CPPT Coinvestment LLC [Member] CPPT Coinvestment Represents information pertaining to Clarion Partners CPPT Coinvestment, LLC. CPPT Lehigh LLC [Member] CPPT Lehigh Represents information pertaining to CPPT Lehigh LLC. LIT Industrial Limited Partnership [Member] LIT Represents information pertaining to LIT Industrial Limited Partnership. Advisor Fee Fixed Component Calculation Daily Accrual Percentage of Net Asset Value for Each Class Fixed component daily accrual proportion of net asset value for each class (as a percent) Represents the percentage of the entity's net asset value for each class, used for calculating the amount of fixed component of advisory fee that accrues daily. Organization and Offering Costs Reimbursement Period from End of Escrow Period Period after end of Escrow Period that Company will make organization and offering cost reimbursements The period of time after the end of the Escrow Period that reimbursements of organization and offering costs are made by the entity. Award Type [Axis] Advisor Fee Fixed Component Start Date Determination Minimum Required Proceeds from Issuance of Common Stock Minimum gross offering proceeds required to be received from the issue of any combination of Class A or Class W shares to determine the start date of the fixed component of the advisor's fee Represents the minimum gross offering proceeds that are required to be received from the issue of any combination of Class A or Class W shares to determine the start date of the fixed component of the advisor's fee. Advisor Fee Performance Component Calculation Minimum Return Per Share Allocable to Class of Stock Minimum return to stockholders of any class, used to calculate performance component (as a percent) Represents the minimum return per share allocable to the class of shares which is the basis for calculation of performance component of advisory fee. Advisor Fee Performance Component Minimum Net Asset Value Per Share Minimum threshold of net asset value per share, used for calculation of performance component (in dollars per share) Represents the minimum net asset value per share considered for payment of performance component of advisor fee. If the net asset value decreases below this value, the increase in net asset value per share to this value will not be included in calculation of performance component. Advisor Fee Performance Component Percentage of Aggregate Total Return Allocable to Class of Stock Maximum threshold of performance component, as a percentage of aggregate total return allocable to a class of share Represents the maximum threshold of performance component, as a percentage of aggregate total return allocable to a class of share. Amendment Description Advisor Fee Performance Component Percentage of Excess Total Return Allocable to Class of Stock Performance component of advisory fee as percentage of excess total return allocable to class of stock Represents the portion of excess total return allocable to class of shares as a part of performance component of advisory fees. Amendment Flag All States and Provinces [Axis] Represents the information with reference to the geopolitical segments of United States or Canada. Represents the stock redemption limit as a percentage of the entity's total net asset value per calendar year. Annual Stock Redemption Limit as Percentage of Total NAV in Any12 Month Period Percentage of stock redemption limit of the company's total NAV in any 12 month period Represents the advisors who manage day to day operations and portfolio of properties and related real estate related assets. CPT Advisors LLC [Member] Advisor CPT Advisors LLC and ING Investments Distributor LLC [Member] Advisor and Dealer Manager Represents information in the aggregate pertaining to CPT Advisors, LLC (Advisor) and ING Investments Distributor, LLC (Dealer Manager). CPT OP Partner LLC [Member] CPT OP Partner Represents CPT OP Partner LLC, an initial limited partner of the Operating Partnership, and later a wholly-owned subsidiary of the reporting entity. CPT Real Estate LP [Member] Operating Partnership Represents CPT Real Estate LP, the "Operating Partnership". Clarion Partners LLC [Member] Clarion Partners Represents Clarion Partners, LLC, a sponsor of the entity. Common Class A and Class W [Member] Class A shares and Class W shares Classification of common stock representing ownership interest in a corporation. Class W A classification of common stock that has different rights than those of Common Class A. Common Class W [Member] Class W shares Common Stock Value Available in Distribution Reinvestment Plan Common stock pursuant to distribution reinvestment plan Represents the value of common stock pursuant to the entity's distribution reinvestment plan. Common Stock Value Available in Primary Offering Common stock in primary offering Represents the value of common stock in primary offering pursuant to a registration statement. Contribution by Related Party to Acquire Partners Interest in Real Estate Partnership Contribution to Operating Partnership by the initial limited partner The contribution made by a related party for an ownership in a partnership, the purpose of which is to construct, sell, hold or invest in real estate. Dealer Manager Agreement [Abstract] Dealer Manager Agreement Dealer Manager Distribution Fee Daily Accrual Calculation Percentage of Net Asset Value for Shares Percentage of NAV for Class A shares used in calculating dealer manager distribution fee daily accrual Represents the percentage of entity's net asset value for shares on which the daily accrual of the dealer manager distribution fee is based. Dealer Manager Fee Daily Accrual Calculation Percentage of Net Asset Value for Each Class Percentage of net asset value per share used in calculating dealer manager fee daily accrual Represents the daily accrual proportion of the dealer manager fee, which is 0.55% of the company's NAV for each share class. Dealer Manager Fee Reallowed to Participating Broker Dealers Calculation Percentage of Net Asset Value used in Calculating Percentage of net asset value per share used in calculating dealer manager fee reallowed to participating broker dealers Represents the percentage of the entity's net asset value used in dealer manager fee reallowed to participating broker dealers if they meet certain thresholds of the entity's shares under management. Current Fiscal Year End Date Distributions Distributions The entire disclosure for distributions. Distributions Disclosure [Text Block] Document and Entity Information Financial Instruments Not Measured at Fair Value [Policy Text Block] Financial Instruments Not Measured at Fair Value Disclosure of the policy of carrying amounts of cash and cash equivalents which approximate their fair value. Funds Raised for Stock Subscriptions Funds raised to be used for stock subscriptions Represents the funds raised, which are to be used for stock subscriptions. ING Investments Distributor LLC [Member] Dealer Manager Represents ING Investments Distributor, LLC, a dealer manager for the company's offering. Represents the Independent Directors Compensation Plan, which operates as a subplan of the Long-Term Incentive Plan. Independent Directors Compensation Plan [Member] Independent Directors Compensation Plan Initial Offering Expected Share Price Expected purchase price of shares of the company (in dollars per share) Represents the expected purchase price of shares of the entity's common stock, not including any selling commissions, if applicable. Initial Offering Minimum Offering Amount Minimum Offering Amount Represents the minimum purchase order received as a condition on shares offered for sale. Limit on Distribution to Stockholders as Percentage of Taxable Income (Loss) Minimum Minimum percentage of taxable income required to be distributed by the company to its stockholders in order to qualify as a REIT Represents the minimum percentage of taxable income required to be distributed by the company to its stockholders in order to qualify as a REIT. Limit on Reimbursement of Expenses Incurred by Advisor Percentage of Average Invested Net Assets Percentage of average invested assets as a limit on reimbursement of operating expenses of Advisor Represents the percentage of average invested assets as a limit for reimbursement of operating expenses of Advisor. Document Period End Date Represents the percentage of net income as a limit on reimbursement of operating expenses of Advisor. Net income is determined without reduction for any additions it reserves for depreciation, bad debts or other similar non-cash reserves and excluding any gain from the sale of the entity's assets for that period. Limit on Reimbursement of Expenses Incurred by Advisor Percentage of Net Income Percentage of net income as a limit on reimbursement of operating expenses of Advisor Long Term Incentive Plan [Member] Long-Term Incentive Plan Represents Long-Term Incentive Plan, which provides for the grant of equity awards to employees, directors, consultants and advisors and was adopted by the entity board of directors. Represents the minimum purchase order amount to be received by the entity as a condition on shares offered for sale to Pennsylvania investors. Minimum Value of Share Purchase Orders Received for Selling Shares Within Stipulated Period from Initial Offering Date Minimum value of purchase orders to be received to sell shares before stipulated period after initial offering date Number of Classes of Shares of Common Stock Number of classes of shares of common stock Represents the number of classes of shares of common stock. Offering Costs Funded by Advisor on Behalf of Entity Offering costs funded by advisor on behalf of entity Represents offering costs funded by the advisor on behalf of the reporting entity during the "escrow period". The "escrow period" began on the date of the "Initial Offering Date" of May 16, 2011. Operating Expenses Funded by Advisor on Behalf of Entity Operating costs funded by advisor on behalf of entity Represents operating expenses funded by the advisor on behalf of the reporting entity during the "escrow period". The "escrow period" began on the date of the "Initial Offering Date" of May 16, 2011. Organization and Offering Costs Reimbursement Limit as Percentage of Gross Proceeds from Primary Offering Maximum Reimbursement limit of organization and offering expenses incurred as a percentage of gross proceeds from the primary offering, maximum Represents the maximum reimbursement limit of organization and offering expenses that are incurred after the end of the Escrow Period, as a percentage of gross proceeds from the primary offering. Organization and Offering Costs Reimbursement Period Following End of Escrow Period Period over which organization and offering expenses are reimbursed following the end of the Escrow Period Represents the organization and offering cost reimbursement period following the end of the Escrow Period. Organizational and Offering Costs Funded by Advisor on Behalf of Entity Organizational and offering costs funded by advisor on behalf of entity Represents organizational and offering costs funded by the advisor on behalf of the reporting entity during the "escrow period". The "escrow period" began on the date of the "Initial Offering Date" of May 16, 2011. Entity [Domain] Organizational Costs Funded by Advisor on Behalf of Entity Organizational costs funded by advisor on behalf of entity Represents organizational costs funded by the advisor on behalf of the reporting entity during the "escrow period". The "escrow period" began on the date of the "Initial Offering Date" of May 16, 2011. Other Assets [Policy Text Block] Other Assets Describes the entity's accounting policy for components of items classified as other assets on the balance sheet. Percentage of NAV for Allocation to Cash Cash Equivalents Securities and Other Liquid Assets Percentage of NAV for allocation to cash, cash equivalents, securities and other liquid assets Represents allocation to cash, cash equivalents, securities and other liquid assets as a percentage of NAV. PENNSYLVANIA Pennsylvania Period of Annual Stock Redemption Limit as Percentage of Total NAV Period of stock redemption limit (in months) Represents period of stock redemption limit. Period of Disqualification after Losing Qualification as R E I T Period for which company will be disqualified following the year during which qualification was lost (in years) Represents the period for which the company will be disqualified following the year during which qualification is lost unless the company is entitled to relief under specific statutory provisions. Period Within which Shares Are Redeemed At NAV Per Share on Date of Redemption after Deducting Short Term Trading Discount Period within which shares are redeemed at NAV per share on the date of redemption after deducting a short-term trading discount (in days) Represents the period within which shares are to be redeemed at net asset value per share of the class of shares being redeemed on the date of redemption, after deducting short-term trading discount. Prepaid Expenses [Policy Text Block] Prepaid Expenses Disclosure of accounting policy of the entity related to prepaid expenses. TENNESSEE Tennessee Percentage of quarterly stock redemption limit of the company's combined NAV of both classes of shares Represents the quarterly stock redemption limit as a percentage of the entity's combined net asset value of both classes of shares as of the last day of the previous calendar quarter. Quarterly Stock Redemption Limit as Percentage of Combined NAV as of Last Day of Previous Calendar Quarter Reimbursement of Expenses Incurred by Advisor Period Considered for Calculation of Limit Number of preceding fiscal quarters considered for calculation of limit on reimbursement of operating expenses Represents the number of preceding fiscal quarters considered for calculation of limit on reimbursement of operating expenses. Selling Commissions to Dealer Manager Maximum Limit Maximum selling commissions (as a percent) Represents the selling commissions as a percentage of total price per share of the shares purchased in the primary offering as of the date of purchase. Represents the number of shares of stock to be issued as a condition for initial grants of restricted stock to be made, as stated in the plan document. Share Based Compensation, Arrangement by Share Based Payment Award Aggregate Shares Issued Condition Number of shares of stock to be issued as a condition for initial grants of restricted stock to be made Share Based Compensation Arrangement by Share Based Payment Award, Award Exercise Term Period after which an employee's right to exercise an award expires. Exercise term (in years) Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options Initial Grants Initial grant of Class A shares of restricted stock Represents the number of shares of restricted stock to be granted in an initial grant which is to take place per conditions stated in the plan. Minimum account balance to be maintained by stockholder Represents the minimum account balance which the stockholder has to maintain as per the share redemption plan, if not maintained the entity may redeem all the shares held by the stockholder. Share Redemption Plan Minimum Account Balance to be Maintained by Stockholder Share Redemption Plan Short Term Trading Discount as Percentage of Gross Proceeds Percentage of short-term trading discount of gross proceeds Represents the short-term trading discount, expressed as a percentage of gross proceeds from redemption, which is applicable if shares are redeemed within a specified period. Summary of Organization and Offering [Line Items] Organization and offering Schedule reflecting the summary of organization and offering policies. Summary of Organization and Offering [Table] Schedule reflecting the summary of organization and offering policies. Deposit in Real Estate Investment Disclosure of accounting policy for deposit on real estate investment. Deposit in Real Estate Investment Policy [Text Block] All States and Provinces [Domain] Purchase Agreement [Member] Purchase Agreement Represents an open purchase agreement. Real Estate Purchase Price Exclusive of Closing Costs Purchase price exclusive of closing costs Represents the amount of real estate purchase price exclusive of closing costs. Proceeds from Expense Support Agreement Aggregate gross proceeds from the offering The cash inflow during the period from Expense Support Agreement. Reimbursement Payment Related to Expense Support Agreement Reimbursement payment The cash outflow from reimbursement payment relating to Expense Support Agreement. Summary of Significant Accounting Policies Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Registrant Name Entity Central Index Key Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Legal Entity [Axis] Document Type Additional Paid in Capital, Common Stock Additional paid-in capital Additional Paid-in Capital Additional Paid-in Capital [Member] Adjustments to reconcile net loss to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] ASSETS Assets [Abstract] Assets Total assets Cash contributed to venture Business Acquisition, Cost of Acquired Entity, Cash Paid Ownership interest Business Acquisition, Percentage of Voting Interests Acquired Purchase price Business Acquisition, Cost of Acquired Entity, Purchase Price Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents Class of Stock [Domain] Class W Class A Common Class A [Member] Class A shares Common Stock Common Stock [Member] Common stock, shares outstanding Common Stock, Shares, Outstanding Common stock Common Stock, Value, Issued Cash consideration for shares issued Common stock, shares issued Common Stock, Shares, Issued Shares of common stock issued (in shares) Balance (in shares) Balance (in shares) Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock authorized (in shares) Economic Dependency Concentration Risk Disclosure [Text Block] Consolidation, Policy [Policy Text Block] Basis of Presentation and Principles of Consolidation Title of Individual [Axis] Deposit on real estate investment Deposit Assets Director [Member] Independent directors Incentive Award Plan Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Incentive Award Plan Due to Related Parties Due to affiliates Total deposit Earnest Money Deposits Weighted average number of common shares outstanding: Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Earnings Per Share, Policy [Policy Text Block] Basic and Diluted Earnings per Common Share Net (loss) income per common share: Earnings Per Share [Abstract] Equity Component [Domain] Escrow Deposit Escrow account First mortgage loan First Mortgage [Member] General and administrative General and Administrative Expense Operating expenses recorded on the entity's books Consolidated Statements of Operations Income (Loss) from Continuing Operations, Per Basic and Diluted Share Basic and diluted (in dollars per share) Income Tax, Policy [Policy Text Block] Income Taxes Due to affiliates Increase (Decrease) in Due to Affiliates Deposit on real estate investment paid by Sponsor directly (recorded in other assets) Increase (Decrease) in Deposit Assets Increase (Decrease) in Operating Capital [Abstract] Change in operating assets and liabilities: Other assets Increase (Decrease) in Other Operating Assets Prepaid assets Increase (Decrease) in Prepaid Expense Increase (Decrease) in Stockholder's Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Liabilities Total liabilities Liabilities and Equity [Abstract] LIABILITIES AND STOCKHOLDER'S EQUITY Total liabilities and stockholder's equity Liabilities and Equity Maximum [Member] Maximum Minimum [Member] Minimum Mortgage Loans on Real Estate, Loan Category [Domain] Mortgage Loans on Real Estate, Other Additions Amount of mortgage loan at the close of venture Mortgage Loans on Real Estate, Description, Loan Category [Axis] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Net change in cash and cash equivalents Net Cash Provided by (Used in) Continuing Operations Net (loss) income Net (loss) income Net Income (Loss) Available to Common Stockholders, Basic Net income New Accounting Pronouncements, Policy [Policy Text Block] Accounting Standards Updates New Contract [Axis] New Contract [Domain] Expenses: Operating Expenses [Abstract] Organization and Offering Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Organization and Offering Other assets Other Assets Contribution to Operating Partnership by the entity Payments to Acquire Partners Interest in Real Estate Partnership, Net of Cash Acquired Initial earnest money deposit paid Payments for Deposits on Real Estate Acquisitions Plan Name [Domain] Plan Name [Axis] Preferred stock, $0.01 par value per share (50,000,000 shares authorized, none issued) Preferred stock, $0.01 par value per share (50,000,000 shares authorized, none issued) Preferred Stock, Value, Issued Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock authorized (in shares) Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Prepaid expenses Prepaid Expense Proceeds from Issuance of Debt Proceeds received from financing Range [Axis] Range [Domain] Deposit in Real Estate Investment Real Estate Investments, Net [Abstract] Related Party Transactions Disclosure [Text Block] Related Party Arrangements Related Party Transaction [Line Items] Related Party Arrangements Organization and Offering Costs Related Party [Domain] Related Party Arrangements Related Party [Axis] Restricted Stock [Member] Restricted stock Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated Deficit Retained Earnings [Member] Economic Dependency Scenario, Unspecified [Domain] Forecast Scenario, Forecast [Member] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Related Party Transactions, by Related Party [Table] Secured Debt Proceeds from mortgage loan secured to partially fund the acquisition Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding shares (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Incentive award plan Share price (in dollars per share) Share Price Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Aggregate number of shares reserved and available for issuance Award Type [Domain] Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Stock-Based Compensation Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Start-up Activities, Cost Policy [Policy Text Block] Organization, Offering and Operating Costs Statement [Table] Scenario [Axis] Statement Statement [Line Items] Capitalization Consolidated Statement of Stockholder's Equity Consolidated Statements of Cash Flows Equity Components [Axis] Consolidated Balance Sheets Class of Stock [Axis] Stock Issued During Period, Shares, Period Increase (Decrease) Issuance of common stock Stock Issued During Period, Value, New Issues Cash consideration for shares issued Amount of shares issued Issuance of common stock (in shares) Stock Issued During Period, Shares, New Issues Shares of common stock issued (in shares) Number of shares issued Stockholder's equity: Stockholders' Equity Attributable to Parent [Abstract] Total stockholder's equity Balance Balance Stockholders' Equity Attributable to Parent Capitalization Stockholders' Equity Note Disclosure [Text Block] Capitalization Stockholders' Equity, Period Increase (Decrease) Subsequent Events [Text Block] Subsequent Events Subsequent Events Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Line Items] Subsequent Event Type [Axis] Subsequent Event [Table] Subsequent event Subsequent Event [Member] SUPPLEMENT TO NONCASH INVESTING ACTIVITY: Supplemental Cash Flow Elements [Abstract] Title of Individual with Relationship to Entity [Domain] Use of Estimates, Policy [Policy Text Block] Use of Estimates Basic and diluted (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted