Business Combinations - Bay View Funding and Focus Business Bank - Consideration Paid (Details) $ / shares in Units, $ in Thousands	Aug. 20, 2015 USD ($) $ / shares shares	Nov. 01, 2014 USD ($)
BVF/CSNK
Consideration Paid
Aggregate purchase price		$ 22,520
Focus Business Bank
Consideration Paid
Aggregate purchase price	$ 66,558
Fixed exchange ratio of company's common stock	1.8235
Shares issued in acquisition | shares	5,456,713
Common stock issued to acquire Focus Business Bank	$ 58,278
Stock price (in dollars per share) | $ / shares	$ 10.68
Purchase consideration paid in cash	$ 8,280