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Disclosure About Fair Value of Financial Instruments - Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) (USD $) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011 | Dec. 31, 2011 | Dec. 31, 2010
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Unrealized gains/(losses) (in AOCL) | $ (101,000) | $ 600,000 | $ 482,000 | $ 129,000 |  |
Amount by which outstanding principal amount exceeds estimated fair value | 1,827,000 | 2,414,000 | 1,827,000 | 2,414,000 | 2,309,000 | 2,543,000
Contingent Consideration to Acquire Real Estate Assets [Member] |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Beginning balance | 677,000 | 0 | 677,000 | 0 |  |
Unrealized gains (in general and administrative) | (114,000) | 0 | (114,000) | 0 |  |
Ending balance | 563,000 | 0 | 563,000 | 0 |  |
Fair value of Level 3 liability | 563,000 | 0 | 563,000 | 0 |  |
Payout percentage (in hundredths) |  |  | 75.00% |  |  |
Tax Increment Financing Bond [Member] |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Beginning balance | 15,371,000 | 15,228,000 | 14,788,000 | 15,699,000 |  |
Unrealized gains/(losses) (in AOCL) | (101,000) | 600,000 | 482,000 | 129,000 |  |
Ending balance | 15,270,000 | 15,828,000 | 15,270,000 | 15,828,000 |  |
Maturity date | Dec. 20, 2020 |  |  |  |  |
Amount by which outstanding principal amount exceeds estimated fair value | 1,800,000 |  | 1,800,000 |  |  |
Decrease in fair value of bond if yield-to-maturity was 100 basis points higher | 500,000 |  | 500,000 |  |  |
Increase in fair value of bond if yield-to-maturity was 100 basis points lower | 600,000 |  | 600,000 |  |  |
Fair value of Level 3 asset | 15,270,000 | 15,828,000 | 15,270,000 | 15,828,000 |  |
Discount rate (in hundredths) |  |  | 10.73% |  |  |
Highwoods Realty Limited Partnership [Member] |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Unrealized gains/(losses) (in AOCL) | (101,000) | 600,000 | 482,000 | 129,000 |  |
Amount by which outstanding principal amount exceeds estimated fair value | 1,827,000 | 2,414,000 | 1,827,000 | 2,414,000 | 2,309,000 | 2,543,000
Highwoods Realty Limited Partnership [Member] | Contingent Consideration to Acquire Real Estate Assets [Member] |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Beginning balance | 677,000 | 0 | 677,000 | 0 |  |
Unrealized gains (in general and administrative) | (114,000) | 0 | (114,000) | 0 |  |
Ending balance | 563,000 | 0 | 563,000 | 0 |  |
Fair value of Level 3 liability | 563,000 | 0 | 563,000 | 0 |  |
Payout percentage (in hundredths) |  |  | 75.00% |  |  |
Highwoods Realty Limited Partnership [Member] | Tax Increment Financing Bond [Member] |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |
Beginning balance | 15,371,000 | 15,228,000 | 14,788,000 | 15,699,000 |  |
Unrealized gains/(losses) (in AOCL) | (101,000) | 600,000 | 482,000 | 129,000 |  |
Ending balance | 15,270,000 | 15,828,000 | 15,270,000 | 15,828,000 |  |
Maturity date | Dec. 20, 2020 |  |  |  |  |
Amount by which outstanding principal amount exceeds estimated fair value | 1,800,000 |  | 1,800,000 |  |  |
Decrease in fair value of bond if yield-to-maturity was 100 basis points higher | 500,000 |  | 500,000 |  |  |
Increase in fair value of bond if yield-to-maturity was 100 basis points lower | 600,000 |  | 600,000 |  |  |
Fair value of Level 3 asset | $ 15,270,000 | $ 15,828,000 | $ 15,270,000 | $ 15,828,000 |  |
Discount rate (in hundredths) |  |  | 10.73% |  |  |

X
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- Definition The amount by which the fair value of the tax increment financing bond would decrease if the yield-to-maturity were 100 basis points higher as of the balance sheet date. + References No definition available. + Details
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- Definition The net amount of gross unrealized gains (losses) for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563 + Details
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- Definition This element represents the amount of any change, including any differences arising upon settlement, recognized during the reporting period in the value of a liability, arising from an item of contingent consideration, assumed in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e7008-128479 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 72 -Subparagraph b -Clause 1 -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. + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Amount of gain (loss) recognized in other comprehensive income, arising from assets measured at fair value on a recurring basis using unobservable inputs (level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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