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Real Estate (Impairments) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting Information [Line Items] |  |  |
Real estate impairments | $ 823 us-gaap_ImpairmentOfRealEstate | $ 4,106 us-gaap_ImpairmentOfRealEstate | $ 10,312 us-gaap_ImpairmentOfRealEstate
Continuing operations |  |  |
Segment Reporting Information [Line Items] |  |  |
Real estate impairments | 760 us-gaap_ImpairmentOfRealEstate / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 3,565 us-gaap_ImpairmentOfRealEstate / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 4,070 us-gaap_ImpairmentOfRealEstate / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Discontinued operations |  |  |
Segment Reporting Information [Line Items] |  |  |
Real estate impairments | $ 63 us-gaap_ImpairmentOfRealEstate / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ 541 us-gaap_ImpairmentOfRealEstate / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember | $ 6,242 us-gaap_ImpairmentOfRealEstate / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentDiscontinuedOperationsMember

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- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 + Details
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