Subsequent Events (Details)	Dec. 31, 2016 USD ($)	Dec. 13, 2016	Jan. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Subsequent Events
Total assets	$ 4,036,311,000			$ 2,789,599,000
Total Gross Loans	3,237,983,000			2,254,118,000	$ 1,628,445,000
Total deposits	3,145,485,000			$ 2,195,123,000
Heritage Oaks Bank
Subsequent Events
Total assets	2,000,000,000
Total Gross Loans	1,400,000,000
Total deposits	1,700,000,000
Number of shares of the entity that the acquired entity's shareholder will receive for each share of acquiree		0.3471
Line of Credit | U.S. Bank
Subsequent Events
Unused facility			$ 15,000,000
Amount outstanding	$ 0