Description of Business, Basis of Presentation and Significant Accounting Policies and Recently Issued Accounting Pronouncements (Details)	Jun. 30, 2017 branch	Dec. 31, 2016 USD ($)	Dec. 31, 2007 USD ($)
Business Description and Basis of Presentation [Line Items]
Issued amount			$ 25,000,000.0
Minimum lease payments		$ 14,700,000
Heritage Bank
Business Description and Basis of Presentation [Line Items]
Number of branches operating | branch	59