Net Interest Expense (Tables)

12 Months Ended

Dec. 31, 2023

Net Interest Expense

Summary of net interest expense

	Year ended December 31,
	2023		2022		2021
	(in thousands)
Interest income:
From non-affiliates:
Cash and short-term investments	$	68,457	$	19,839	$	3,280
Loans held for sale at fair value		279,506		172,124		275,176
Placement fees relating to custodial funds		284,877		102,099		21,326
		632,840		294,062		299,782
From Townsgate Closing Services, LLC		84		—		—
From PennyMac Mortgage Investment Trust		—		—		387
		632,924		294,062		300,169
Interest expense:
To non-affiliates:
Assets sold under agreements to repurchase		279,289		105,459		164,132
Mortgage loan participation purchase and sale agreements		16,129		7,314		4,153
Notes payable secured by mortgage servicing assets		211,085		79,813		39,782
Unsecured senior notes		98,396		95,014		70,208
Obligations under capital lease		—		20		169
Interest shortfall on repayments of mortgage loans serviced for Agency securitizations		21,538		40,741		105,430
Interest on mortgage loan impound deposits		9,795		7,066		5,545
Other		1,545		—		—
		637,777		335,427		389,419
To PennyMac Mortgage Investment Trust—Excess servicing spread financing at fair value		—		—		1,280
		637,777		335,427		390,699
	$	(4,853)	$	(41,365)	$	(90,530)