Fair Value Measurements (Details Textual) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Fair Value Measurements (Textual) [Abstract]
Fair value assets transfers between level 1 and level 2 transfer amount	$ 0	$ 0	$ 0	$ 0

Fair value assets transfers between level one and level two transfers amount.

No definition available.

Name:	hfwa_FairValueAssetsTransfersBetweenLevelOneAndLevelTwoTransfersAmount
Namespace Prefix:	hfwa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration