CONSOLIDATED STATEMENTS OF INCOME (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenue
Net gains on mortgage loans held for sale at fair value	$ 25,949,000	$ 39,760,000	$ 108,560,000	$ 68,487,000
Loan origination fees	6,280,000	2,752,000	18,260,000	5,439,000
Loan servicing fees
From non-affiliates	14,596,000	2,154,000	35,397,000	8,776,000
Ancillary and other fees	2,777,000	1,153,000	7,700,000	3,661,000
Net servicing income	29,562,000	10,526,000	75,873,000	34,370,000
Amortization, impairment and change in estimated fair value of mortgage servicing rights	(8,163,000)	(4,414,000)	(16,363,000)	(9,024,000)
Net servicing income	21,399,000	6,112,000	59,510,000	25,346,000
Management fees:
Management fees	10,540,000	6,114,000	29,375,000	15,163,000
Net interest income (expense):
Interest income	5,093,000	1,914,000	11,310,000	4,491,000
Interest expense	4,156,000	2,042,000	11,686,000	4,226,000
Net interest income (expense)	937,000	(128,000)	(376,000)	265,000
Change in fair value of investment in and dividends received from affiliate	950,000	1,009,000	1,774,000	2,515,000
Other	785,000	695,000	1,842,000	1,886,000
Total net revenue	87,194,000	76,232,000	296,139,000	155,567,000
Expenses
Compensation	35,830,000	31,856,000	113,850,000	77,756,000
Professional services	2,831,000	1,287,000	7,901,000	3,538,000
Loan origination	2,802,000	1,787,000	7,825,000	1,803,000
Technology	2,587,000	1,057,000	6,203,000	3,161,000
Servicing	1,931,000	999,000	5,072,000	2,438,000
Occupancy	796,000	394,000	1,883,000	1,078,000
Other	5,500,000	989,000	12,966,000	2,890,000
Total expenses	52,277,000	38,369,000	155,700,000	92,664,000
Income before provision for income taxes	34,917,000	37,863,000	140,439,000	62,903,000
Provision for income taxes	3,493,000		5,531,000
Net income	31,424,000	37,863,000	134,908,000	62,903,000
Less: Net income attributable to noncontrolling interest	26,227,000		126,918,000
Net income attributable to PennyMac Financial Services, Inc. common stockholders	5,197,000		7,990,000
Earnings per common share
Basic (in dollars per share)	$ 0.29		$ 0.50
Diluted (in dollars per share)	$ 0.28		$ 0.50
Weighted-average common shares outstanding
Basic (in shares)	17,958		16,042
Diluted (in shares)	75,876		75,867
PennyMac Mortgage Investment Trust
Revenue
Fulfillment fees from affiliate	18,327,000	17,258,000	68,625,000	31,097,000
Loan servicing fees
From affiliates	10,738,000	4,600,000	27,251,000	13,163,000
Management fees:
Management fees	8,539,000	3,672,000	23,486,000	7,964,000
Net interest income (expense):
Change in fair value of investment in and dividends received from affiliate	165,000	314,000	(68,000)	630,000
Investment Funds
Loan servicing fees
From affiliates	1,813,000	2,484,000	6,060,000	9,130,000
Mortgage servicing rebate (to) from Investment Funds	(362,000)	135,000	(535,000)	(360,000)
Management fees:
Management fees	2,001,000	2,442,000	5,889,000	7,199,000
Carried Interest from Investment Funds	$ 2,812,000	$ 3,355,000	$ 10,411,000	$ 7,254,000