Other Noninterest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Other Noninterest Expense [Abstract]
Advertising	$ 2,357	$ 2,165
Ad valorem and franchise taxes	2,303	2,715
Printing and supplies	1,111	1,217
Insurance expense	835	922
Travel expense	949	1,219
Entertainment and contributions	1,632	1,639
Tax credit investment amortization	1,743	2,095
Other miscellaneous	5,779	2,834
Total other noninterest expense	$ 16,709	$ 14,806