CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
ASSETS
Cash (includes $81,640 and $20,765 pledged to creditors)	$ 102,627	$ 37,725
Short-term investments at fair value	145,476	170,080
Mortgage loans held for sale at fair value (includes $2,389,066 and $3,081,987 pledged to creditors)	2,416,955	3,099,103
Derivative assets	73,618	78,179
Servicing advances, net (includes valuation allowance of $65,393 and $59,958; $102,222 and $114,643 pledged to creditors)	259,609	318,066
Mortgage servicing rights (includes $2,785,964 and $638,010 at fair value; $2,539,575 and $2,098,067 pledged to creditors)	2,785,964	2,119,588
Real estate acquired in settlement of loans	2,493	2,447
Furniture, fixtures, equipment and building improvements, net (includes $19,022 and $23,915 pledged to creditors)	31,662	29,453
Capitalized software, net (includes $1,231 and $1,568 pledged to creditors)	36,484	25,729
Mortgage loans eligible for repurchase	889,335	1,208,195
Other	86,194	107,076
Total assets	6,992,530	7,368,093
LIABILITIES
Assets sold under agreements to repurchase	1,739,638	2,381,538
Mortgage loans participation purchase and sale agreements	524,667	527,395
Notes payable	1,291,847	891,505
Obligations under capital lease	9,630	20,971
Derivative liabilities	12,693	5,796
Accounts payable and accrued expenses	140,363	109,143
Mortgage servicing liabilities at fair value	9,769	14,120
Income taxes payable	74,158	52,160
Liability for mortgage loans eligible for repurchase	889,335	1,208,195
Liability for losses under representations and warranties	21,022	20,053
Total liabilities	5,075,820	5,648,419
Commitments and contingencies - Note 14
STOCKHOLDERS' EQUITY
Additional paid-in capital	236,457	204,103
Retained earnings	304,386	265,306
Total stockholders' equity attributable to PennyMac Financial Services, Inc. common stockholders	540,846	469,411
Noncontrolling interest in Private National Mortgage Acceptance Company, LLC	1,375,864	1,250,263
Total stockholders' equity	1,916,710	1,719,674
Total liabilities and stockholders' equity	6,992,530	7,368,093
Class A Common Stock
STOCKHOLDERS' EQUITY
Common stock	3	2
Total stockholders' equity	3
Class B Common Stock
STOCKHOLDERS' EQUITY
Common stock
PMT
ASSETS
Assets purchased from PennyMac Mortgage Investment Trust under agreements to resell pledged to creditors	133,128	144,128
Investment in PennyMac Mortgage Investment Trust at fair value	1,518	1,205
Receivable, from affiliates	27,467	27,119
LIABILITIES
Excess servicing spread financing payable to PennyMac Mortgage Investment Trust at fair value	223,275	236,534
Payable to affiliates	91,818	136,998
Private National Mortgage Acceptance Company, LLC
LIABILITIES
Payable to exchanged Private National Mortgage Acceptance Company, LLC unitholders under tax receivable agreement	$ 47,605	$ 44,011