Other Noninterest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Other Noninterest Expense [Abstract]
Advertising	$ 3,077	$ 2,357
Ad valorem and franchise taxes	3,036	2,303
Printing and supplies	1,178	1,111
Insurance expense	817	835
Travel expense	1,059	949
Entertainment and contributions	1,783	1,632
Tax credit investment amortization	1,212	1,743
Other miscellaneous	6,468	5,779
Total other noninterest expense	$ 18,630	$ 16,709