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Mortgage Loans on Real Estate (Troubled Debt Restructurings) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 loans	Dec. 31, 2017 USD ($) loans
Financing Receivable, Modifications [Line Items]
Financing receivable, modifications, period of time of delaying principal and/or interest, months	3 months
Number of TDRs | loans	0	2
Principal balance outstanding		$ 4,880
Specific loan loss allowance		(467)
Net carrying amount		$ 4,413
South Atlantic
Financing Receivable, Modifications [Line Items]
Number of TDRs | loans		1
Principal balance outstanding		$ 2,947
Specific loan loss allowance		0
Net carrying amount		$ 2,947
East
Financing Receivable, Modifications [Line Items]
Number of TDRs | loans		1
Principal balance outstanding		$ 1,933
Specific loan loss allowance		(467)
Net carrying amount		$ 1,466

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Financing receivable, modifications, period of time of delaying principal and / or interest.

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Amount of allowance for credit losses related to receivables which had been measured under a general allowance for credit losses methodology that are now identified as troubled debt restructurings.

+ References

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
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Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

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-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
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