Loans Receivable, net - Schedule of Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Net book value of loans receivable by year of origination, current fiscal year	$ 2,361,114	$ 1,152,443
Net book value of loans receivable by year of origination, one year before current fiscal year	687,623	619,077
Net book value of loans receivable by year of origination, two year before current fiscal year	401,167	3,508,778
Net book value of loans receivable by year of origination, three year before current fiscal year	2,760,248	2,059,942
Net book value of loans receivable by year of origination, four year before current fiscal year	1,512,413	72,325
Net book value of loans receivable by year of origination, more than five years before current fiscal year	119,042	83,909
Total	7,841,607	7,496,474	$ 7,782,219
CECL reserve	(77,270)	(93,664)	$ (79,851)
Loans receivable, net	7,764,337	7,402,810
1
Financing Receivable, Credit Quality Indicator [Line Items]
Net book value of loans receivable by year of origination, current fiscal year	0	0
Net book value of loans receivable by year of origination, one year before current fiscal year	0	0
Net book value of loans receivable by year of origination, two year before current fiscal year	0	0
Net book value of loans receivable by year of origination, three year before current fiscal year	0	0
Net book value of loans receivable by year of origination, four year before current fiscal year	0	0
Net book value of loans receivable by year of origination, more than five years before current fiscal year	0	0
Total	0	0
2
Financing Receivable, Credit Quality Indicator [Line Items]
Net book value of loans receivable by year of origination, current fiscal year	0	0
Net book value of loans receivable by year of origination, one year before current fiscal year	0	0
Net book value of loans receivable by year of origination, two year before current fiscal year	0	0
Net book value of loans receivable by year of origination, three year before current fiscal year	0	0
Net book value of loans receivable by year of origination, four year before current fiscal year	0	0
Net book value of loans receivable by year of origination, more than five years before current fiscal year	0	0
Total	0	0
3
Financing Receivable, Credit Quality Indicator [Line Items]
Net book value of loans receivable by year of origination, current fiscal year	2,361,114	1,152,443
Net book value of loans receivable by year of origination, one year before current fiscal year	687,623	619,077
Net book value of loans receivable by year of origination, two year before current fiscal year	401,167	3,082,618
Net book value of loans receivable by year of origination, three year before current fiscal year	2,322,908	1,859,065
Net book value of loans receivable by year of origination, four year before current fiscal year	1,359,935	57,383
Net book value of loans receivable by year of origination, more than five years before current fiscal year	96,479	61,347
Total	7,229,226	6,831,933
4
Financing Receivable, Credit Quality Indicator [Line Items]
Net book value of loans receivable by year of origination, current fiscal year	0	0
Net book value of loans receivable by year of origination, one year before current fiscal year	0	0
Net book value of loans receivable by year of origination, two year before current fiscal year	0	321,160
Net book value of loans receivable by year of origination, three year before current fiscal year	374,409	200,877
Net book value of loans receivable by year of origination, four year before current fiscal year	117,484	14,942
Net book value of loans receivable by year of origination, more than five years before current fiscal year	0	22,562
Total	491,893	559,541
5
Financing Receivable, Credit Quality Indicator [Line Items]
Net book value of loans receivable by year of origination, current fiscal year	0	0
Net book value of loans receivable by year of origination, one year before current fiscal year	0	0
Net book value of loans receivable by year of origination, two year before current fiscal year	0	105,000
Net book value of loans receivable by year of origination, three year before current fiscal year	62,931	0
Net book value of loans receivable by year of origination, four year before current fiscal year	34,994	0
Net book value of loans receivable by year of origination, more than five years before current fiscal year	22,563	0
Total	$ 120,488	$ 105,000

FS Credit Real Estate Income Trust, Inc. 10-K