Acquisitions (Schedule of Merger-Related Expense) (Details) - FNBC Transaction [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Personnel expense	$ 1,435	$ 1,542
Net occupancy and equipment expense	276	277
Professional services expense	2,200	6,827
Other real estate	(1,511)	(1,511)
Advertising expense	901	1,031
Other expense	713	2,311
Total merger-related expenses	$ 4,014	$ 10,477