CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY
Cash dividend declared per share (in dollars per share)	$ 0.40	$ 0.36	$ 0.32
Focus Business Bank
CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY
Issuance of common shares to acquire Focus Business Bank, net of offering costs of $144 (in shares)			5,456,713
Issuance of 5,456,713 common shares to acquire Focus Business Bank, offering costs			$ 144