Investment in PennyMac Mortgage Investment Trust at Fair Value (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Investment in PennyMac Mortgage Investment Trust at Fair Value
Change in fair value and dividends received	$ 950	$ 1,009	$ 1,774	$ 2,515
PMT
Investment in PennyMac Mortgage Investment Trust at Fair Value
Dividends	43	41	128	124
Change in fair value	122	273	(196)	506
Change in fair value and dividends received	165	314	(68)	630
Fair value of PMT shares at period end	$ 1,701	$ 1,753	$ 1,701	$ 1,753