Business Combinations - Purchase Price (Details) $ / shares in Units, $ in Thousands	Mar. 11, 2016 USD ($) $ / shares shares	Jul. 15, 2015 USD ($) $ / shares shares
Bank shares, Inc [Member]
Business Acquisition [Line Items]
Shares exchanged for cash		$ 1,481,000
Common shares outstanding | shares		3,501,185
Per share exchange ratio		0.3114
Number of shares of common stock issued | shares		1,090,269
Multiplied by common stock price per share | $ / shares		$ 15.75
Value of common stock issued		$ 17,171,737
Total purchase price		$ 18,652,737
Floridian Financial Group, Inc [Member]
Business Acquisition [Line Items]
Shares exchanged for cash	$ 26,699,000
Common shares outstanding | shares	6,222,119
Per share exchange ratio	0.5289
Number of shares of common stock issued | shares	3,291,066
Multiplied by common stock price per share | $ / shares	$ 15.47
Value of common stock issued	$ 50,912,791
Total purchase price	$ 77,611,791