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Mortgages and Notes Receivable (Details) (USD $) | 12 Months Ended |  |  | 12 Months Ended |  |  |  | 12 Months Ended |  |  | 12 Months Ended |  |  |
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Dec. 31, 2012 acre | Dec. 31, 2011 | Dec. 31, 2010 Seller Financing [Member] transactions | Dec. 31, 2012 Seller Financing [Member] | Dec. 31, 2011 Seller Financing [Member] | Dec. 31, 2012 Mortgage Receivable [Member] acre | Dec. 31, 2011 Mortgage Receivable [Member] | Dec. 31, 2012 Promissory Notes [Member] | Dec. 31, 2011 Promissory Notes [Member] | Dec. 31, 2012 Highwoods Realty Limited Partnership [Member] acre | Dec. 31, 2011 Highwoods Realty Limited Partnership [Member] | Dec. 31, 2010 Highwoods Realty Limited Partnership [Member] Seller Financing [Member] transactions | Dec. 31, 2012 Highwoods Realty Limited Partnership [Member] Seller Financing [Member] | Dec. 31, 2011 Highwoods Realty Limited Partnership [Member] Seller Financing [Member] | Dec. 31, 2012 Highwoods Realty Limited Partnership [Member] Mortgage Receivable [Member] acre | Dec. 31, 2011 Highwoods Realty Limited Partnership [Member] Mortgage Receivable [Member] | Dec. 31, 2012 Highwoods Realty Limited Partnership [Member] Promissory Notes [Member] | Dec. 31, 2011 Highwoods Realty Limited Partnership [Member] Promissory Notes [Member]
Mortgages and Notes Receivable, Net [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgages and notes receivable, gross |  |  |  | $ 15,853,000 | $ 17,180,000 | $ 8,648,000 | $ 0 | $ 1,153,000 | $ 1,481,000 |  |  |  | $ 15,853,000 | $ 17,180,000 | $ 8,648,000 | $ 0 | $ 1,153,000 | $ 1,481,000
Mortgages and notes receivable, allowance | (182,000) | (61,000) |  | 0 | 0 | 0 |  | (182,000) | (61,000) | (182,000) | (61,000) |  | 0 | 0 | 0 |  | (182,000) | (61,000)
Mortgages and notes receivable, net | 25,472,000 | 18,600,000 |  | 15,853,000 | 17,180,000 | 8,648,000 | 0 | 971,000 | 1,420,000 | 25,472,000 | 18,600,000 |  | 15,853,000 | 17,180,000 | 8,648,000 | 0 | 971,000 | 1,420,000
Number of transactions with seller financing |  |  | 2 |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |
Acquisition of development land (in acres) |  |  |  |  |  | 77 |  |  |  |  |  |  |  |  | 77 |  |  |
Undeveloped land suitable for future development (in acres) | 649 |  |  |  |  | 68 |  |  |  | 649 |  |  |  |  | 68 |  |  |
Mortgage receivable, maturity date |  |  |  |  |  | Dec. 01, 2015 |  |  |  |  |  |  |  |  | Dec. 01, 2015 |  |  |
Mortgage receivable, current interest rate (in hundredths) |  |  |  |  |  | 5.00% |  |  |  |  |  |  |  |  | 5.00% |  |  |
Term of optional extension |  |  |  |  |  | 3 years |  |  |  |  |  |  |  |  | 3 years |  |  |
Additional loan commitment to third party |  |  |  |  |  | 8,400,000 |  |  |  |  |  |  |  |  | 8,400,000 |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning notes receivable allowance | 61,000 | 868,000 |  | 0 | 0 | 0 |  | 182,000 | 61,000 | 61,000 | 868,000 |  | 0 | 0 | 0 |  | 182,000 | 61,000
Bad debt expense | 186,000 | 196,000 |  |  |  |  |  |  |  | 186,000 | 196,000 |  |  |  |  |  |  |
Recoveries/write-offs/other | (65,000) | (1,003,000) |  |  |  |  |  |  |  | (65,000) | (1,003,000) |  |  |  |  |  |  |
Total notes receivable allowance | $ 182,000 | $ 61,000 |  | $ 0 | $ 0 | $ 0 |  | $ 182,000 | $ 61,000 | $ 182,000 | $ 61,000 |  | $ 0 | $ 0 | $ 0 |  | $ 182,000 | $ 61,000

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- Definition Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(3)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 10 -Subparagraph 3 -Article 9 + Details
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- Definition Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Article 5 + Details
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- Definition The sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 168, 169, 170 -IssueDate 2006-05-01 -Chapter 5 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: 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=6943989&loc=d3e3602-108585 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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