Earnings Per Common Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
Basic earnings per share of common stock:
Net income attributable to common stockholders	$ 5,197	$ 7,990
Weighted-average shares outstanding	17,958	16,042
Basic earnings per share (in dollars per share)	$ 0.29	$ 0.50
Diluted earnings per share of common stock:
Net income	5,197	7,990
Effect of net income attributable to noncontrolling interest, net of tax	15,685	29,595
Diluted net income attributable to common stockholders	$ 20,882	$ 37,585
Weighted-average common stock outstanding	17,958	16,042
Dilutive potential exchangeable PennyMac Class A common units to common stock	57,888	59,804
Dilutive potential common stock - issuable under stock-based compensation plans (in shares)	30	21
Diluted weighted-average common Stock outstanding	75,876	75,867
Diluted earnings per share of common stock (in dollars per share)	$ 0.28	$ 0.50