Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Stockholders' Equity (Details) - USD ($) shares in Thousands, $ in Thousands		12 Months Ended		48 Months Ended
	Nov. 01, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Jun. 30, 2017
Stockholders' Equity
Cost of shares of common stock repurchased		$ 467	$ 8,599
Common Stock
Stockholders' Equity
Authorized stock repurchase amount					$ 50,000
Shares of common stock repurchased		260	505	765
Cost of shares of common stock repurchased		$ 5,293	$ 8,599	$ 13,892
New PFSI \| Class A Unit
Stockholders' Equity
Common stock conversion ratio (as a percent)	100.00%
New PFSI \| Common Stock
Stockholders' Equity
Common stock conversion ratio (as a percent)	1.00%