Other Noninterest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Other Noninterest Expense [Abstract]
Advertising	$ 2,693	$ 2,133	$ 5,050	$ 4,298
Ad valorem and franchise taxes	2,340	2,736	4,643	5,451
Printing and supplies	1,065	1,158	2,176	2,375
Insurance expense	829	928	1,664	1,850
Travel expense	1,079	1,308	2,028	2,527
Entertainment and contributions	2,001	1,736	3,633	3,375
Tax credit investment amortization	1,833	2,096	3,576	4,191
Other miscellaneous	4,633	10,211	10,412	13,045
Total other noninterest expense	$ 16,473	$ 22,306	$ 33,182	$ 37,112