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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 | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Mar. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2012 | Dec. 31, 2011
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |
Unrealized gains (in AOCL) | $ (91,000) | $ 296,000 | $ 299,000 | $ 583,000 |  |  |  |
Amount by which outstanding principal amount exceeds estimated fair value | 1,599,000 | 1,726,000 | 1,599,000 | 1,726,000 | 1,508,000 | 1,898,000 | 2,022,000 | 2,309,000
Contingent Consideration to Acquire Real Estate Assets [Member] |  |  |  |  |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | 375,000 | 0 | 563,000 | 0 |  |  |  |
Unrealized gains (in general and administrative) | 9,000 | 0 | (179,000) | 0 |  |  |  |
Ending balance | 384,000 | 0 | 384,000 | 0 |  |  |  |
Fair value of Level 3 liability | 384,000 | 0 | 384,000 | 0 |  |  |  |
Payout percentage (in hundredths) |  |  | 50.00% |  |  |  |  |
Tax Increment Financing Bond [Member] |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | 14,324,000 | 15,075,000 | 14,496,000 | 14,788,000 |  |  |  |
Principal repayment | 0 | 0 | (562,000) | 0 |  |  |  |
Unrealized gains (in AOCL) | (91,000) | 296,000 | 299,000 | 583,000 |  |  |  |
Ending balance | 14,233,000 | 15,371,000 | 14,233,000 | 15,371,000 |  |  |  |
Maturity date | Dec. 20, 2020 |  |  |  |  |  |  |
Amount by which outstanding principal amount exceeds estimated fair value | 1,600,000 |  | 1,600,000 |  |  |  |  |
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 | 500,000 |  | 500,000 |  |  |  |  |
Fair value of Level 3 asset | 14,233,000 | 15,371,000 | 14,233,000 | 15,371,000 |  |  |  |
Discount rate (in hundredths) |  |  | 10.20% |  |  |  |  |
Impaired Real Estate Assets [Member] |  |  |  |  |  |  |  |
Impaired real estate assets [Abstract] |  |  |  |  |  |  |  |
Fair value of Level 3 asset | $ 5,866,000 |  | $ 5,866,000 |  |  |  |  |
Impaired Real Estate Assets [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |
Discount rate (in hundredths) |  |  | 14.00% |  |  |  |  |
Impaired real estate assets [Abstract] |  |  |  |  |  |  |  |
Capitalization rate (in hundredths) |  |  | 9.50% |  |  |  |  |
Impaired Real Estate Assets [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |  |  |  |
Discount rate (in hundredths) |  |  | 15.00% |  |  |  |  |
Impaired real estate assets [Abstract] |  |  |  |  |  |  |  |
Capitalization rate (in hundredths) |  |  | 10.50% |  |  |  |  |

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- Definition The amount by which the fair value of the tax increment financing bond would increase if the yield-to-maturity were 100 basis points lower as of the balance sheet date. + References No definition available. + Details
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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 Percentage of total available contingent consideration expected to be paid out. + References No definition available. + Details
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- Definition This element represents an asset measured on a nonrecurring basis at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. + References No definition available. + Details
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- Definition Date of maturity of a debt security categorized as neither trading nor held-to-maturity, in CCYY-MM-DD format. + 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 Ratio of the net operating income produced by an asset and its capital cost (original prices paid to buy the asset), used as an input to measure fair value. + 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 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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- Definition Settlements that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy. + 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)(2) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. + 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) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c -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 This element represents a liability measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. + 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) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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