Shareholders' Equity - Regulatory Capital (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Total capital to risk-weighted assets:
Actual, Capital Amount	$ 199,810	$ 187,198
Actual, Ratio (as a percent)	14.26%	14.38%
Capital Needed For Adequacy Purposes, Capital Amount	$ 112,096	$ 104,111
Capital Needed For Adequacy Purposes, Ratio (as a percent)	8.10%	8.00%
Tier I capital to risk-weighted assets:
Actual, Capital Amount	$ 182,234	$ 170,918
Actual regulatory, Tier I capital (as a percent)	13.01%	13.13%
Capital Needed For Adequacy Purposes, Capital Amount	$ 84,072	$ 52,056
Capital Needed For Adequacy Purposes, Ratio (as a percent)	6.00%	4.00%
Tier I capital to average assets:
Actual, Capital Amount	$ 182,234	$ 170,918
Actual regulatory, Leverage ratio (as a percent)	9.90%	10.22%
Capital Needed For Adequacy Purposes, Capital Amount	$ 73,664	$ 66,902
Capital Needed For Adequacy Purposes, Ratio (as a percent)	4.00%	4.00%
Common Equity Tier I capital to risk-weighted assets:
Actual, Capital Amount	$ 176,722
Actual regulatory, Tier I capital (as a percent)	12.61%
Capital Needed For Adequacy Purposes, Capital Amount	$ 63,054
Capital Needed For Adequacy Purposes, Ratio (as a percent)	4.50%
Heritage Oaks Bank
Total capital to risk-weighted assets:
Actual, Capital Amount	$ 192,221	$ 180,640
Actual, Ratio (as a percent)	13.74%	13.88%
Capital Needed For Adequacy Purposes, Capital Amount	$ 111,951	$ 104,101
Capital Needed For Adequacy Purposes, Ratio (as a percent)	8.00%	8.00%
Capital Needed To Be Well Capitalized Under Prompt Corrective Action Provisions, Capital Amount	$ 139,939	$ 130,126
Capital Needed To Be Well Capitalized Under Prompt Corrective Action Provisions, rate	10.00%	10.00%
Tier I capital to risk-weighted assets:
Actual, Capital Amount	$ 174,667	$ 164,361
Actual regulatory, Tier I capital (as a percent)	12.48%	12.63%
Capital Needed For Adequacy Purposes, Capital Amount	$ 83,963	$ 52,050
Capital Needed For Adequacy Purposes, Ratio (as a percent)	4.00%	4.00%
Capital Needed To Be Well Capitalized Under Prompt Corrective Action Provisions, Capital Amount	$ 111,951	$ 78,076
Capital Needed To Be Well Capitalized Under Prompt Corrective Action Provisions, rate	8.00%	6.00%
Tier I capital to average assets:
Actual, Capital Amount	$ 174,667	$ 164,361
Actual regulatory, Leverage ratio (as a percent)	9.50%	9.83%
Capital Needed For Adequacy Purposes, Capital Amount	$ 73,581	$ 66,889
Capital Needed For Adequacy Purposes, Ratio (as a percent)	4.00%	4.00%
Capital Needed To Be Well Capitalized Under Prompt Corrective Action Provisions, Capital Amount	$ 91,976	$ 83,611
Capital Needed To Be Well Capitalized Under Prompt Corrective Action Provisions, rate	5.00%	5.00%
Common Equity Tier I capital to risk-weighted assets:
Actual, Capital Amount	$ 174,667
Actual regulatory, Tier I capital (as a percent)	12.48%
Capital Needed For Adequacy Purposes, Capital Amount	$ 62,972
Capital Needed For Adequacy Purposes, Ratio (as a percent)	4.50%
Capital Needed To Be Well Capitalized Under Prompt Corrective Action Provisions, Capital Amount	$ 90,960
Capital Needed To Be Well Capitalized Under Prompt Corrective Action Provisions, rate	6.50%
Junior subordinated debentures
Tier I capital to risk-weighted assets:
Actual, Capital Amount	$ 10,000	$ 12,800
Common Equity Tier I capital to risk-weighted assets:
Redemption of debt	$ 3,000