Subsequent Events (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares	Oct. 01, 2015 USD ($) $ / shares	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)
Assets	$ 2,715,298		$ 2,038,897	$ 2,034,248
Totals	2,167,547		1,628,445	1,547,911
Deposits	$ 2,139,207		$ 1,630,826	$ 1,543,466
Business Acquisition, Equity Interests Issued or Issuable Number of Shares Issued Per Share of Acquiree	0.9629
Share Price | $ / shares	$ 20.32
Consideration paid	$ 118,900
Cash consideration	$ 766
Business Acquisition Period, before Announcement of Acquisition Transaction for which Average Closing Price of Stock Considered to Calculate Value of Shares Issuable	20 days
Minimum
Stock price of the acquired entity (in dollars per share) | $ / shares	$ 16.550
Maximum
Stock price of the acquired entity (in dollars per share) | $ / shares	$ 22.391
Subsequent Event [Member] | Security California Bancorp [Member]
Assets		$ 733,000
Totals		477,000
Deposits		$ 648,000
Stock price of the acquired entity (in dollars per share) | $ / shares		$ 19.57