Branch Acquisition (Noninterest Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Business Acquisition [Line Items]
Salaries and employee benefits	$ 4,732	$ 4,406	$ 14,325	$ 13,100
Occupancy and equipment	814	726	2,412	1,785
Information Technology and Data Processing	356	372	1,031	1,131
Marketing	85	102	269	202
Other general and administrative	639	551	1,805	1,497
Total noninterest expense	7,201	$ 6,836	21,715	$ 19,740
Opus Bank [Member]
Business Acquisition [Line Items]
Salaries and employee benefits	251		792
Occupancy and equipment	91		309
Information Technology and Data Processing	1		1
Marketing	7		23
Other general and administrative	15		58
Total noninterest expense	$ 365		$ 1,183