Revenue from Contracts with Customers (Schedule of Noninterest Income) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Service charges on deposit accounts:
Overdraft fees		$ 2,049	$ 1,674
Maintenance and activity fees		1,214	940
Other service charges, commissions, and fees:
Interchange income		3,064	2,283
Other fees		1,533	890
Fees from presold mortgage loans	[1]	859	768
Commissions from sales of insurance and financial products:
Insurance income		1,414	428
Wealth management income		526	412
SBA consulting fees		1,141	1,260
SBA loan sale gains	[1]	3,802	622
Bank-owned life insurance income	[1]	623	508
Foreclosed property gains (losses), net		(288)	25
Securities gains (losses), net			(235)
Other gains (losses), net	[1]	4	234
Total noninterest income		$ 15,941	$ 9,809

[1] Not within the scope of ASC 606.