CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Mortgage loan servicing fees
From non-affiliates and affiliates	$ 166,790	$ 135,483
Ancillary and other fees	22,017	14,171
Mortgage loan servicing fees	199,377	160,673
Change in fair value of mortgage servicing rights and mortgage servicing liabilities	(122,857)	(36,963)
Change in fair value of excess servicing spread payable to PennyMac Mortgage Investment Trust	(118,806)	(43,884)
Net mortgage loan servicing fees	80,571	116,789
Net gains on mortgage loans held for sale at fair value:
From non-affiliates	58,753	59,028
Net gains on mortgage loans held for sale at fair value	84,776	71,414
Mortgage loan origination fees from non-affiliates	21,687	23,355
Mortgage loan origination fees	23,930	24,563
Interest income:
From non-affiliates	56,537	40,639
Interest income	58,333	42,615
Interest expense:
To non-affiliates	34,477	32,811
Interest expense	37,543	36,745
Net interest income	20,790	5,870
Management fees, net:
Management fees	7,248	5,775
Result of real estate acquired in settlement of loans	274	(28)
Other	2,350	1,872
Total net revenue	247,705	238,201
Expenses
Compensation	106,600	102,013
Servicing	30,293	26,299
Technology	15,966	14,620
Loan origination	14,497	2,115
Occupancy and equipment	6,776	6,377
Professional services	5,881	5,738
Marketing	1,325	2,161
Other	6,076	5,882
Total expenses	187,414	165,205
Income before provision for income taxes	60,291	72,996
Provision for income taxes	14,156	6,070
Net income	46,135	66,926
Less: Net income attributable to noncontrolling interest		50,307
Net income attributable to PennyMac Financial Services, Inc. common stockholders	$ 46,135	$ 16,619
Earnings per share
Basic (in dollars per share)	$ 0.59	$ 0.70
Diluted (in dollars per share)	$ 0.58	$ 0.67
Weighted-average shares outstanding
Basic (in shares)	77,653	23,832
Diluted (in shares)	79,286	79,461
PMT
Mortgage loan servicing fees
From non-affiliates and affiliates	$ 10,570	$ 11,019
Changes in fair value included in income	4,051	(6,921)
Net gains on mortgage loans held for sale at fair value:
From PennyMac Mortgage Investment Trust	26,023	12,386
Mortgage loan origination fees from PennyMac Mortgage Investment Trust	2,243	1,208
Fulfillment fees from PennyMac Mortgage Investment Trust	27,574	11,944
Interest income:
From PennyMac Mortgage Investment Trust	1,796	1,976
Interest expense:
To PennyMac Mortgage Investment Trust	3,066	3,934
Management fees, net:
Management fees	7,248	5,696
Change in fair value of investment in and dividends received from affiliate	$ 192	182
Investment Funds
Management fees, net:
Management fees		79
Carried Interest from Investment Funds		$ (180)