CONSOLIDATED CONDENSED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Preferred	Common Stock	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2014						$ (1,630)
Comprehensive income
Net income	$ 51,207
Other comprehensive income, net of tax	(1,984)
Ending balance at Sep. 30, 2015						(3,614)
Beginning balance (in shares) at Dec. 31, 2015		125	40,664,259
Beginning balance at Dec. 31, 2015	850,509	$ 125	$ 5,083	$ 504,530	$ 342,133	(1,362)
Comprehensive income
Net income	58,758				58,758
Other comprehensive income, net of tax	5,286					5,286
Cash dividends on common stock ($.39 per share)	(16,023)				(16,023)
Share-based compensation (in shares)			110,251
Share-based compensation	1,883		$ 14	1,869
Stock issued under employee benefit plans (in shares)			15,968
Stock issued under employee benefit plans	338		$ 2	336
Stock issued under dividend reinvestment and stock purchase plan (in shares)			23,882
Stock issued under dividend reinvestment and stock purchase plan	$ 605		$ 3	602
Stock options exercised (in shares)	22,385		22,385
Stock options exercised	$ 350		$ 3	347
Stock redeemed (in shares)			(37,720)
Stock redeemed	(841)		$ (5)	(836)
Ending balance (in shares) at Sep. 30, 2016		125	40,799,025
Ending balance at Sep. 30, 2016	$ 900,865	$ 125	$ 5,100	$ 506,848	$ 384,868	$ 3,924