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Loans and Investments, Summary of impaired loans (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) loan	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) loan	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($) loan
Loans and Investments
Unpaid Principal Balance (UPB)	$ 138,189		$ 138,189		$ 169,824
Carrying Value	131,860		131,860		163,550
Allowance for Loan Losses	60,951		60,951		$ 62,783
Average Recorded Investment	137,364	$ 195,087	154,007	$ 196,363
Interest Income Recognized	$ 59	28	$ 168	472
Number of impaired loans | loan	5		5		4
Land
Loans and Investments
Unpaid Principal Balance (UPB)	$ 134,215		$ 134,215		$ 131,086
Carrying Value	127,886		127,886		124,812
Allowance for Loan Losses	57,751		57,751		53,883
Average Recorded Investment	133,387	131,086	132,651	131,086
Interest Income Recognized	26		75
Hotel
Loans and Investments
Unpaid Principal Balance (UPB)					34,750
Carrying Value					34,750
Allowance for Loan Losses					5,700
Average Recorded Investment		34,750	17,375	34,750
Interest Income Recognized				371
Office
Loans and Investments
Unpaid Principal Balance (UPB)	2,274		2,274		2,288
Carrying Value	2,274		2,274		2,288
Allowance for Loan Losses	1,500		1,500		1,500
Average Recorded Investment	2,277	27,551	2,281	27,556
Interest Income Recognized	33	28	93	79
Commercial
Loans and Investments
Unpaid Principal Balance (UPB)	1,700		1,700		1,700
Carrying Value	1,700		1,700		1,700
Allowance for Loan Losses	1,700		1,700		$ 1,700
Average Recorded Investment	$ 1,700	$ 1,700	$ 1,700	1,700
Multifamily
Loans and Investments
Average Recorded Investment				1,271
Interest Income Recognized				$ 22

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- Definition

The carrying value of impaired financing receivables derived after deducting unearned revenue and other holdbacks.

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Amount of allowance for credit losses related to recorded investment.

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