CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net gains on loans held for sale at fair value:
From non-affiliates	$ 175,070	$ 38,349	$ 345,045	$ 143,396
Net gains on loans held for sale at fair value	235,732	56,914	468,041	189,274
Loan origination fees from non-affiliates	45,212	24,366	100,721	70,607
Loan origination fees	49,434	26,485	110,288	75,476
Loan servicing fees
From non-affiliates and affiliates	185,967	147,182	533,510	421,536
Other	26,018	17,009	74,043	44,817
Loan servicing fees	224,949	174,262	642,655	496,877
Change in fair value of mortgage servicing rights and mortgage servicing liabilities	(162,584)	(63,450)	(448,240)	(147,670)
Change in fair value of excess servicing spread payable to PennyMac Mortgage Investment Trust	(158,720)	(64,559)	(436,721)	(156,696)
Net loan servicing fees	66,229	109,703	205,934	340,181
Interest income:
From non-affiliates	81,925	59,152	207,670	152,997
Interest income	83,452	60,964	212,685	158,683
Interest expense:
To non-affiliates	54,089	35,035	138,723	96,552
Interest expense	56,380	38,775	146,847	108,136
Net interest income	27,072	22,189	65,838	50,547
Management fees, net:
Management fees	10,098	6,471	26,178	17,910
Result of real estate acquired in settlement of loans	188	194	1,205	179
Other	2,379	2,605	6,855	7,048
Total net revenue	436,347	250,929	987,029	733,428
Expenses
Compensation	141,132	103,364	362,449	303,917
Servicing	47,909	40,797	107,210	95,586
Loan origination	34,851	7,203	72,419	14,462
Technology	20,385	15,273	52,431	45,047
Occupancy and equipment	7,257	7,117	21,075	20,001
Professional services	9,682	7,117	21,876	18,442
Other	8,934	8,361	23,491	26,582
Total expenses	270,150	189,232	660,951	524,037
Income before provision for income taxes	166,197	61,697	326,078	209,391
Provision for income taxes	44,724	5,545	85,774	17,908
Net income	121,473	56,152	240,304	191,483
Less: Net income attributable to noncontrolling interest		41,663		142,538
Net income attributable to PennyMac Financial Services, Inc. common stockholders	$ 121,473	$ 14,489	$ 240,304	$ 48,945
Earnings per share
Basic (in dollars per share)	$ 1.55	$ 0.58	$ 3.08	$ 1.99
Diluted (in dollars per share)	$ 1.51	$ 0.57	$ 3.01	$ 1.94
Weighted-average shares outstanding
Basic (in shares)	78,361	25,125	78,119	24,644
Diluted (in shares)	80,382	78,913	79,821	78,954
Dividend declared per share of Class A common stock (in dollars per share)		$ 0.40		$ 0.40
PMT
Net gains on loans held for sale at fair value:
From PennyMac Mortgage Investment Trust	$ 60,662	$ 18,565	$ 122,996	$ 45,878
Loan origination fees from PennyMac Mortgage Investment Trust	4,222	2,119	9,567	4,869
Fulfillment fees from PennyMac Mortgage Investment Trust	45,149	26,256	102,313	52,759
Loan servicing fees
From non-affiliates and affiliates	12,964	10,071	35,102	30,521
Changes in fair value included in income	3,864	(1,109)	11,519	(9,026)
Interest income:
From PennyMac Mortgage Investment Trust	1,527	1,812	5,015	5,686
Interest expense:
To PennyMac Mortgage Investment Trust	2,291	3,740	8,124	11,584
Management fees, net:
Management fees	10,098	6,482	26,178	17,906
Change in fair value of investment in and dividends received from affiliate	$ 66	129	$ 377	419
Investment Funds
Loan servicing fees
From non-affiliates and affiliates				3
Management fees, net:
Management fees		(11)		4
Carried Interest from Investment Funds		$ (17)		$ (365)