Amount of allowance for credit loss on accounts receivable.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount after tax of increase (decrease) to equity or (increase) decrease to net assets, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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General (Details)	6 Months Ended
General (Details)	Jun. 30, 2020 USD ($) segment	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)	Jan. 01, 2019 USD ($)
Number of operating segments \| segment	1
Provision for federal or state income taxes	$ 0
Cumulative effect of the adoption of the ASC 842				$ (42,808,000)
Expected credit losses for financial instruments
Interest Receivable		$ 29,701,000	$ 26,586,000
Mortgage Loans Receivable
Expected credit losses for financial instruments
Balance at the Beginning of the period	2,580,000
Increase/Decrease in Expected Credit Loss	2,580,000	2,580,000	2,560,000
Balance at the End of the Period	2,560,000
Notes Receivable
Expected credit losses for financial instruments
Balance at the Beginning of the period	163,000
Increase/Decrease in Expected Credit Loss	163,000	$ 163,000	181,000
Balance at the End of the Period	181,000
ASU 2016-02
Cumulative effect of the adoption of the ASC 842					$ 42,808,000
ASU 2016-13 \| Restatement Adjustment \| Mortgage Loans Receivable
Expected credit losses for financial instruments
Increase/Decrease in Expected Credit Loss	20,000		20,000
Balance at the End of the Period	20,000
ASU 2016-13 \| Restatement Adjustment \| Notes Receivable
Expected credit losses for financial instruments
Increase/Decrease in Expected Credit Loss	(18,000)		$ (18,000)
Balance at the End of the Period	$ (18,000)