Securities Available for Sale - Schedule of Contractual Maturities of AFS Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Amortized Cost
Amortized Cost, Due after 1 year through 5 years	$ 3,337,715
Amortized Cost, Due after 5 years through 10 years	48,079
Amortized Cost, Due after 10 years	383,678
Amortized Cost	3,769,472	$ 3,492,264
Fair Value
Fair Value, Due after 1 year through 5 years	3,361,514
Fair Value, Due after 5 years through 10 years	44,527
Fair Value, Due after 10 years	336,263
Fair Value	$ 3,742,304	3,452,648
Weighted-average Yield, Due after 1 year through 5 years	6.74%
Weighted-average Yield, Due after 5 years through 10 years	3.80%
Weighted-average Yield, Due after 10 years	3.04%
Weighted-average Yield	6.30%
Senior asset-backed securities related to Structured Program transactions
Amortized Cost
Amortized Cost, Due after 1 year through 5 years	$ 3,109,548
Amortized Cost	3,109,548	2,870,071
Fair Value
Fair Value, Due after 1 year through 5 years	3,138,818
Fair Value	3,138,818	2,899,824
Other asset-backed securities related to Structured Program transactions
Amortized Cost
Amortized Cost, Due after 1 year through 5 years	212,315
Amortized Cost	212,315	174,132
Fair Value
Fair Value, Due after 1 year through 5 years	207,125
Fair Value	207,125	169,948
U.S. agency securities
Amortized Cost
Amortized Cost, Due after 1 year through 5 years	7,850
Amortized Cost, Due after 5 years through 10 years	33,473
Amortized Cost, Due after 10 years	46,140
Amortized Cost	87,463	90,459
Fair Value
Fair Value, Due after 1 year through 5 years	7,758
Fair Value, Due after 5 years through 10 years	30,170
Fair Value, Due after 10 years	38,208
Fair Value	76,136	75,946
U.S. agency residential mortgage-backed securities
Amortized Cost
Amortized Cost, Due after 5 years through 10 years	3,083
Amortized Cost, Due after 10 years	269,645
Fair Value
Fair Value, Due after 5 years through 10 years	2,981
Fair Value, Due after 10 years	236,029
Fair Value	239,010	226,925
Mortgage-backed securities
Amortized Cost
Amortized Cost, Due after 1 year through 5 years	2,630
Amortized Cost, Due after 5 years through 10 years	889
Amortized Cost, Due after 10 years	57,633
Amortized Cost	61,152	62,882
Fair Value
Fair Value, Due after 1 year through 5 years	2,459
Fair Value, Due after 5 years through 10 years	782
Fair Value, Due after 10 years	52,742
Fair Value	55,983	56,674
Municipal securities
Amortized Cost
Amortized Cost, Due after 1 year through 5 years	306
Amortized Cost, Due after 5 years through 10 years	308
Amortized Cost, Due after 10 years	2,607
Amortized Cost	3,221	3,236
Fair Value
Fair Value, Due after 1 year through 5 years	288
Fair Value, Due after 5 years through 10 years	284
Fair Value, Due after 10 years	2,007
Fair Value	2,579	2,539
Other securities
Amortized Cost
Amortized Cost, Due after 1 year through 5 years	5,066
Amortized Cost, Due after 5 years through 10 years	10,326
Amortized Cost, Due after 10 years	7,653
Amortized Cost	23,045	21,364
Fair Value
Fair Value, Due after 1 year through 5 years	5,066
Fair Value, Due after 5 years through 10 years	10,310
Fair Value, Due after 10 years	7,277
Fair Value	$ 22,653	$ 20,792

LendingClub Corp 10-Q