Description of Business, Basis of Presentation and Significant Accounting Policies and Recent Issued Accounting Policies (Details)	Sep. 30, 2015 Branch	Dec. 31, 2007 USD ($)
Business Description and Basis of Presentation [Line Items]
Issued amount | $		$ 25,000,000.0
Heritage Bank
Business Description and Basis of Presentation [Line Items]
Number of branches operating	67