CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Mortgage loan servicing fees
From non-affiliates and affiliates	$ 585,101	$ 475,848	$ 385,633
Ancillary and other fees	64,133	58,924	46,910
Mortgage loan servicing fees	691,282	579,297	485,741
Amortization, impairment and change in fair value of mortgage servicing rights and mortgage servicing liabilities	(237,389)	(292,588)	(324,198)
Change in fair value of excess servicing spread payable to PennyMac Mortgage Investment Trust	(245,889)	(273,238)	(300,275)
Net mortgage loan servicing fees	445,393	306,059	185,466
Net gains on mortgage loans held for sale at fair value:
From non-affiliates	184,439	369,815	539,872
Net gains on mortgage loans held for sale at fair value	249,022	391,804	531,780
Mortgage loan origination fees from non-affiliates	94,208	112,124	118,844
Mortgage loan origination fees	101,641	119,202	125,534
Fulfillment fees from PennyMac Mortgage Investment Trust			86,465
Interest income:
From non-affiliates	208,954	135,141	73,297
Interest income	216,416	143,179	81,127
Interest expense:
To non-affiliates	129,459	127,569	83,605
Interest expense	144,597	144,520	106,206
Net interest income (expense):	71,819	(1,341)	(25,079)
Management fees, net:
Management fees	24,469	23,585	22,746
Carried Interest from Investment Funds	(365)	(1,040)	980
Result of real estate acquired in settlement of loans	589	94	(82)
Revaluation of payable to exchanged Private National Mortgage Acceptance Company , LLC unitholders under tax receivable agreement	1,126	32,940	551
Other	9,253	3,683	3,302
Total net revenue	984,629	955,463	931,887
Expenses
Compensation	403,270	358,721	342,153
Servicing	137,104	117,696	85,857
Technology	60,103	52,013	35,322
Professional services	27,615	17,845	18,078
Loan origination	27,398	20,429	22,528
Occupancy and equipment	27,152	22,615	17,140
Marketing	8,207	9,118	5,264
Other	26,083	21,117	22,462
Total expenses	716,932	619,554	548,804
Income before provision for income taxes	267,697	335,909	383,083
Provision for income taxes	23,254	24,387	46,103
Net income	244,443	311,522	336,980
Less: Net income attributable to noncontrolling interest	156,749	210,765	270,901
Net income attributable to PennyMac Financial Services, Inc. common stockholders	$ 87,694	$ 100,757	$ 66,079
Earnings per share
Basic (in dollars per share)	$ 2.62	$ 4.34	$ 2.98
Diluted (in dollars per share)	$ 2.59	$ 4.03	$ 2.94
Weighted-average shares outstanding
Basic (in shares)	33,524	23,199	22,161
Diluted (in shares)	35,322	24,999	76,629
PMT
Mortgage loan servicing fees
From non-affiliates and affiliates	$ 42,045	$ 43,064	$ 50,615
Change in fair value of excess servicing spread payable to PennyMac Mortgage Investment Trust	(8,500)	19,350	23,923
Net mortgage loan servicing fees			185,466
Net gains on mortgage loans held for sale at fair value:
Recapture payable to PennyMac Mortgage Investment Trust	64,583	21,989	(8,092)
Mortgage loan origination fees from PennyMac Mortgage Investment Trust	7,433	7,078	6,690
Fulfillment fees from PennyMac Mortgage Investment Trust	81,350	80,359	86,465
Interest income:
From PennyMac Mortgage Investment Trust	7,462	8,038	7,830
Interest expense:
To PennyMac Mortgage Investment Trust	15,138	16,951	22,601
Management fees, net:
Management fees	24,465	22,584	20,657
Change in fair value of investment in and dividends received from affiliate	332	118	224
Investment Funds
Mortgage loan servicing fees
From non-affiliates and affiliates	3	1,461	2,583
Management fees, net:
Management fees	4	1,001	2,089
Carried Interest from Investment Funds	$ (365)	$ (1,040)	$ 980