Acquisitions (Business Acquisition, Pro Forma Information) (Details) - Universal Bancorp [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Net interest income	$ 65,394	$ 64,837
Provision for loan losses	(2,120)	(1,220)
Net interest income after provision	63,274	63,617
Non-interest income	19,852	20,656
Non-interest expense	(64,551)	(60,908)
Income before income taxes	18,575	23,365
Income tax benefit (expense)	(2,167)	(8,313)
Net income to common shareholders	$ 16,408	$ 15,052
Basic earnings per share	$ 1.91	$ 1.76
Diluted earnings per share	$ 1.88	$ 1.73