Related Party Transactions (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Directors and executive officers
Loans made to directors and executive officers
Outstanding balance, beginning of year	$ 20,087,000
Additional loans made	18,452,000
Repayments	(13,548,000)
Outstanding balance, end of year	24,991,000
Firms affiliated with directors
Payments to affiliated firms:
Facility rent	240,000	237,000	233,000
Legal consulting fees	15,000	14,000	6,000
Fuel for company owned vehicles			5,000
Total payments to affiliated firms	255,000	251,000	244,000
Heritage Oaks Bank
Loans made to directors and executive officers
Related party deposits	$ 3,200,000	$ 2,700,000