Commitments and Contingencies - Minimum Payments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Contractual obligations
Contractual obligations, Due Less Than One Year	$ 1,626,391
Contractual obligations, One to Three Years	89,736
Contractual obligations, Three to Five Years	49,683
Contractual obligations, More than Five Years	50,677
Total Obligations	1,816,487	$ 1,693,613
Operating lease obligations
Operating lease obligations, Due 2014	1,328
Operating lease obligations, One to Three Years	2,209
Operating lease obligations, Three to Five Years	2,074
Operating lease obligations, More than 5 Years	1,665
Operating lease obligations, Total	7,276	7,083
Long-term Debt
Total rent expense charged for leases	1,500	1,600	$ 1,800
Deposits
Contractual obligations
Contractual obligations, Due Less Than One Year	1,581,301
Contractual obligations, One to Three Years	74,503
Contractual obligations, Three to Five Years	23,585
Contractual obligations, More than Five Years	4,498
Total Obligations	1,683,887	1,564,944
Salary continuation payments
Contractual obligations
Contractual obligations, Due Less Than One Year	262
Contractual obligations, One to Three Years	524
Contractual obligations, Three to Five Years	524
Contractual obligations, More than Five Years	3,018
Total Obligations	4,328	4,590
FHLB Advances and other
Contractual obligations
Contractual obligations, Due Less Than One Year	43,500
Contractual obligations, One to Three Years	12,500
Contractual obligations, Three to Five Years	23,500
Contractual obligations, More than Five Years	28,000
Total Obligations	107,500	103,500
Junior subordinated debentures
Long-term Debt
Debt obligations, More than Five Years	13,496
Long-term Debt, Total	$ 13,496	$ 13,496
Minimum
Long-term Debt
Optional extension period of operating leases	5 years
Maximum
Long-term Debt
Optional extension period of operating leases	7 years
No Stated Maturity | Deposits
Contractual obligations
Contractual obligations, Due Less Than One Year	$ 1,400,000
Heritage Oaks Capital Trust II, Mission Community Capital Trust I, and Santa Lucia Bancorp | Heritage Oaks Bancorp | Junior subordinated debentures
Long-term Debt
Debt Instrument, Face Amount	$ 13,500