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, 2016						$ (13,581)
Comprehensive income:
Net income	$ 23,193
Other comprehensive income (loss), net of tax	9,859
Ending balance at Mar. 31, 2017						(3,722)
Beginning balance (in shares) at Dec. 31, 2017		125	49,158,238
Beginning balance at Dec. 31, 2017	1,303,463	$ 125	$ 6,145	$ 834,870	$ 465,231	(2,908)
Comprehensive income:
Net income	36,679				36,679
Other comprehensive income (loss), net of tax	(18,191)					(18,191)
Cash dividends on common stock ($.18 per share)	(8,912)				(8,912)
Reclassification adjustment under ASU 2018-02	0				626	(626)
Share-based compensation (in shares)			93,076
Share-based compensation	875		$ 12	863
Stock issued under employee benefit plans (in shares)			4,363
Stock issued under employee benefit plans	159		$ 1	158
Stock issued under dividend reinvestment and stock purchase plan (in shares)			5,614
Stock issued under dividend reinvestment and stock purchase plan	$ 250		$ 1	249
Stock options exercised (in shares)	23,557		23,557
Stock options exercised	$ 535		$ 3	532
Stock redeemed (in shares)			(41,752)
Stock redeemed	(1,785)		$ (7)	(1,778)
Ending balance (in shares) at Mar. 31, 2018		125	49,243,096
Ending balance at Mar. 31, 2018	$ 1,313,073	$ 125	$ 6,155	$ 834,894	$ 493,624	$ (21,725)