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Leases (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2011 leases | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010 | Mar. 31, 2010 | Dec. 31, 2011 leases | Dec. 31, 2010 | Dec. 31, 2009
Operating Leases, Future Minimum Payments Receivable [Abstract] |  |  |  |  |  |  |  |  |  |  |
2012 | $ 153,304 |  |  |  |  |  |  |  | $ 153,304 |  |
2013 | 151,302 |  |  |  |  |  |  |  | 151,302 |  |
2014 | 148,684 |  |  |  |  |  |  |  | 148,684 |  |
2015 | 148,384 |  |  |  |  |  |  |  | 148,384 |  |
2016 | 138,570 |  |  |  |  |  |  |  | 138,570 |  |
Thereafter | 1,367,758 |  |  |  |  |  |  |  | 1,367,758 |  |
Additional Rent Based on Percentage of Tenant's sales |  |  |  |  |  |  |  |  | 574 | 665 | 633
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues | 64,607 | 64,737 | 62,036 | 62,872 | 62,250 | 61,390 | 59,166 | 58,544 | 254,252 | 241,350 | 223,529
Lessee [Abstract] |  |  |  |  |  |  |  |  |  |  |
Number of Ground Leases | 2 |  |  |  |  |  |  |  | 2 |  |
Operating Leases, Future Minimum Payments Due [Abstract] |  |  |  |  |  |  |  |  |  |  |
2012 | 802 |  |  |  |  |  |  |  | 802 |  |
2013 | 803 |  |  |  |  |  |  |  | 803 |  |
2014 | 802 |  |  |  |  |  |  |  | 802 |  |
2015 | 803 |  |  |  |  |  |  |  | 803 |  |
2016 | 802 |  |  |  |  |  |  |  | 802 |  |
Thereafter | 8,203 |  |  |  |  |  |  |  | 8,203 |  |
Rent expense |  |  |  |  |  |  |  |  | 848 | 848 | 848
Minimum Term [Member] |  |  |  |  |  |  |  |  |  |  |
Leases Lease Terms [Line Items] |  |  |  |  |  |  |  |  |  |  |
Lease term range as Lessor |  |  |  |  |  |  |  |  | 5 years |  |
Maximum Term [Member] |  |  |  |  |  |  |  |  |  |  |
Leases Lease Terms [Line Items] |  |  |  |  |  |  |  |  |  |  |
Lease term range as Lessor |  |  |  |  |  |  |  |  | 25 years |  |
Customer Concentration Risk [Member] | Bloomberg [Member] |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | $ 84,526 | $ 83,137 | $ 77,988
Percentage Rent Contributed By Tenant | 33.00% |  |  |  | 34.00% |  |  |  | 33.00% | 34.00% | 35.00%
Flushing Property [Member] |  |  |  |  |  |  |  |  |  |  |
Lessee [Abstract] |  |  |  |  |  |  |  |  |  |  |
Expiration year | 2027 |  |  |  |  |  |  |  | 2027 |  |
Flushing Property [Member] | Ten Year Extension Option [Member] |  |  |  |  |  |  |  |  |  |  |
Lessee [Abstract] |  |  |  |  |  |  |  |  |  |  |
Number Of Extension Options | 1 |  |  |  |  |  |  |  | 1 |  |
Kings Plaza Regional Shopping Center [Member] |  |  |  |  |  |  |  |  |  |  |
Lessee [Abstract] |  |  |  |  |  |  |  |  |  |  |
Expiration year | 2018 |  |  |  |  |  |  |  | 2018 |  |
Kings Plaza Regional Shopping Center [Member] | Ten Year Extension Option [Member] |  |  |  |  |  |  |  |  |  |  |
Lessee [Abstract] |  |  |  |  |  |  |  |  |  |  |
Number Of Extension Options | 4 |  |  |  |  |  |  |  | 4 |  |
Kings Plaza Regional Shopping Center [Member] | Nine Year Extension Option [Member] |  |  |  |  |  |  |  |  |  |  |
Lessee [Abstract] |  |  |  |  |  |  |  |  |  |  |
Number Of Extension Options | 1 |  |  |  |  |  |  |  | 1 |  |

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13537-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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- Definition This element represents the rental revenue earned during the period from lessee-operators based on revenues generated in their operations, generally in excess of a base amount. Such rental revenue is generally stipulated in the lease agreement, usually will provide for a fixed percentage of revenue to be paid as additional (or possibly only) rent due the lessor, and may be based on gross revenues, net revenues, or multiple variations thereof. Percentage rent is often required under leases with retail outlets located on premises owned by hoteliers, cruise lines, others in the hospitality industry, and shopping mall operators, among others. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 13 -Paragraph 23 -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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition The aggregate revenue from real estate operations during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 5 -Section 03 -Paragraph 1 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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