Business Combinations - Purchase Price (Details) - The Bank shares Inc [Member] $ / shares in Units, $ in Thousands	1 Months Ended
	Jul. 17, 2015 USD ($) $ / shares shares
Business Acquisition [Line Items]
Grand preferred B shares exchanged for cash	$ 1,481,000
Number of Grand 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 on July 17, 2015 | $ / shares	$ 15.75
Value of common stock issued	$ 17,171,737
Total purchase price	$ 18,652,737