Current and Deferred Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 3,351	$ 141	$ 1,181
State	1,544	253	368
Total current provision	4,895	394	1,549
Deferred:
Federal	3,250	3,116	3,816
State	737	1,239	1,632
Total deferred provision / (benefit)	3,987	4,355	5,448
Income Tax Expense	8,882	4,749	6,997
Reconciliation of the statutory federal income tax expense / (benefit) to the Company's effective income tax (benefit) / expense
Tax provision at federal statutory tax rate	8,481	4,800	6,243
State income taxes, net of federal income tax benefit	1,568	970	1,300
Tax exempt income, net of interest expense	(962)	(826)	(610)
Bank owned life insurance	(224)	(217)	(167)
Merger and integration		61	271
Other, net	19	(39)	(40)
Total income tax provision / (benefit)	$ 8,882	$ 4,749	$ 6,997
Reconciliation of the statutory federal income tax expense / (benefit) rate to the Company's effective income tax (benefit) / expense rate
Tax provision at federal statutory tax rate (as a percent)	35.00%	35.00%	35.00%
State income taxes, net of federal income tax benefit (as a percent)	6.50%	7.10%	7.30%
Bank owned life insurance (as a percent)	(0.90%)	(1.60%)	(0.90%)
Tax exempt income, net of interest expense (as a percent)	(4.00%)	(6.00%)	(3.40%)
Merger and integration (as a percent)		0.40%	1.50%
Other, net (as a percent)	0.10%	(0.30%)	(0.30%)
Total income tax provision / (benefit) (as a percent)	36.70%	34.60%	39.20%
Heritage Oaks Bancorp
Deferred:
Income Tax Expense	$ (395)	$ (576)	$ (347)
Reconciliation of the statutory federal income tax expense / (benefit) to the Company's effective income tax (benefit) / expense
Total income tax provision / (benefit)	$ (395)	$ (576)	$ (347)