Acquisitions (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions		12 Months Ended
	Oct. 01, 2015	Dec. 31, 2015
ACQUISITIONS
Goodwill, Acquired During Period		$ 55,162
Patriot Bancshares Inc
ACQUISITIONS
Total assets	$ 1,400,000
Total loans	1,100,000
Total deposits	1,100,000
Total shareholders equity	$ 125,200
Number of shares issued upon merger	10.4
Value of stock issued upon merger	$ 123,700
Business Acquisition, Share Price	$ 11.85
Series B and C Preferred stock	$ 27,300
Goodwill, Acquired During Period	55,200
Core deposit intangibles.	8,300
Deferred tax assets, net	$ 7,300