Concentration of Credit Risk (Tables)

9 Months Ended

Sep. 30, 2018

Loans And Leases Receivable Disclosure [Line Items]

Summary of Loan Portfolio by Property/ Loan Category Type

Property Type

A summary of the loan portfolio by property type as of September 30, 2018 and December 31, 2017 based on total loan commitment and current unpaid principal balance (“UPB”) is as follows (dollars in thousands):

	September 30, 2018
Property Type	Loan Commitment		Unfunded Commitment		% of Loan Commitment			Loan UPB		% of Loan UPB
Office	$	1,776,866	$	272,336		37.8	%	$	1,504,530		36.0	%
Multifamily		950,808		76,023		20.2			874,785		20.9
Mixed Use		758,500		87,567		16.1			670,933		16.1
Hotel		627,994		13,290		13.3			614,704		14.7
Condominium		276,044		25,462		5.9			250,582		6.0
Retail		239,058		52,424		5.1			186,634		4.5
Industrial		66,500		—		1.4			66,500		1.6
Other		10,061		—		0.2			10,061		0.2
Total	$	4,705,831	$	527,102		100.0	%	$	4,178,729		100.0	%
	December 31, 2017
Property Type	Loan Commitment		Unfunded Commitment		% of Loan Commitment			Loan UPB		% of Loan UPB
Office	$	836,826	$	160,450		22.5	%	$	676,376		21.1	%
Multifamily		813,775		75,509		21.8			738,266		23.1
Hotel		693,569		27,980		18.6			665,589		20.8
Condominium		679,779		166,358		18.2			513,421		16.1
Mixed Use		431,500		57,243		11.6			374,257		11.7
Retail		195,012		41,500		5.2			153,512		4.8
Industrial		66,500		—		1.8			66,500		2.1
Other		10,195		—		0.3			10,195		0.3
Total	$	3,727,156	$	529,040		100.0	%	$	3,198,116		100.0	%

Summary of Geographic Composition of Loans Held for Investment Based on Current UPB and Loan Commitment

All of the Company’s loans held for investment are secured by properties within the United States. The geographic composition of loans held for investment based on total loan commitment and current UPB as of September 30, 2018 and December 31, 2017 is as follows (dollars in thousands):

	September 30, 2018
Geographic Region	Loan Commitment		Unfunded Commitment		% Loan Commitment			Loan UPB		% Loan UPB
East	$	2,068,065	$	163,056		44.0	%	$	1,905,009		45.6	%
South		1,442,929		257,013		30.7			1,185,916		28.4
West		744,940		87,885		15.8			657,055		15.7
Midwest		400,897		19,148		8.5			381,749		9.1
Various		49,000		—		1.0			49,000		1.2
Total	$	4,705,831	$	527,102		100.0	%	$	4,178,729		100.0	%
	December 31, 2017
Geographic Region	Loan Commitment		Unfunded Commitment		% Loan Commitment			Loan UPB		% Loan UPB
East	$	1,600,619	$	167,447		42.9	%	$	1,433,172		44.8	%
South		1,147,510		278,890		30.8			868,620		27.2
West		674,123		67,746		18.1			606,377		19.0
Midwest		255,904		14,957		6.9			240,947		7.5
Various		49,000		—		1.3			49,000		1.5
Total	$	3,727,156	$	529,040		100.0	%	$	3,198,116		100.0	%

Loan Category

Loans And Leases Receivable Disclosure [Line Items]

Summary of Loan Portfolio by Property/ Loan Category Type

A summary of the loan portfolio by category as of September 30, 2018 and December 31, 2017 based on total loan commitment and current UPB is as follows (dollars in thousands):

	September 30, 2018
Loan Category	Loan Commitment		Unfunded Commitment		% Loan Commitment			Loan UPB		% Loan UPB
Bridge	$	2,503,711	$	203,679		53.2	%	$	2,300,032		55.0	%
Light Transitional		1,365,820		194,652		29.0			1,171,168		28.0
Moderate Transitional		727,499		118,309		15.5			609,190		14.6
Construction		108,801		10,462		2.3			98,339		2.4
Total	$	4,705,831	$	527,102		100.0	%	$	4,178,729		100.0	%
	December 31, 2017
Loan Category	Loan Commitment		Unfunded Commitment		% Loan Commitment			Loan UPB		% Loan UPB
Bridge	$	1,927,488	$	176,316		51.7	%	$	1,751,172		54.7	%
Moderate Transitional		723,075		132,483		19.4			590,592		18.5
Construction		609,468		166,358		16.4			443,110		13.9
Light Transitional		467,125		53,883		12.5			413,242		12.9
Total	$	3,727,156	$	529,040		100.0	%	$	3,198,116		100.0	%