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Schedule IV - Mortgage Loans on Real Estate Schedule IV - Mortgage Loans on Real Estate (Roll-Forward) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Schedule IV - Mortgage Loans on Real Estate [Abstract] |  |  |
Mortgage Loans on Real Estate, January 1 | $ 99,179 | $ 101,124 | $ 34,850
Mortgage Loans on Real Estate, New Mortgage Loans | 33,823 | 66,446 | 83,411
Amortization of Deferred Charges | 1,005 | 669 | 336
Mortgage Loans On Real Estate Total Additions | 34,828 | 67,115 | 83,747
Settlement of mortgage note by real estate acquisition | 0 | 0 | 1,545
Mortgage Loans on Real Estate, Collections of Principal | 35,897 | 69,060 | 15,928
Mortgage Loans On Real Estate, Total Deductions | 35,897 | 69,060 | 17,473
Mortgage Loans on Real Estate, December 31 | $ 98,110 | $ 99,179 | $ 101,124

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- Definition This element represents the total amount of additions to mortgage loans during the reporting period. + References No definition available. + Details
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- Definition The total amount of reductions in principal on mortgage loans. + References No definition available. + Details
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- Definition Schedule IV - Mortgage Loans on Real Estate [Abstract] + References No definition available. + Details
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- Definition Settlement Of Mortgage Note By Real Estate Acquisition + References No definition available. + Details
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- Definition The amount of amortization of deferred charges applied against earnings during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Total carrying amount of mortgage loans as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29.6) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
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- Definition The amount of principal collected on mortgage loans on real estate during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29.6) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 + Details
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- Definition Total amount of new mortgage loans on real estate during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29.6) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 + Details
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