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, 2015						$ (1,362)
Comprehensive income
Net income	$ 37,699
Other comprehensive income, net of tax	8,397
Issuance of common stock related to acquisition
Ending balance at Jun. 30, 2016						7,035
Beginning balance (in shares) at Dec. 31, 2016		125	40,912,697
Beginning balance at Dec. 31, 2016	901,657	$ 125	$ 5,114	$ 509,018	$ 400,981	(13,581)
Comprehensive income
Net income	47,329				47,329
Other comprehensive income, net of tax	14,965					14,965
Cash dividends on common stock ($.33 per share)	(14,001)				(14,001)
Issuance of common stock related to acquisition (in shares)			2,080,833
Issuance of common stock related to acquisition	82,588		$ 260	82,328
Share-based compensation (in shares)			81,397
Share-based compensation	1,061		$ 10	1,051
Stock issued under employee benefit plans (in shares)			7,288
Stock issued under employee benefit plans	246		$ 1	245
Stock issued under dividend reinvestment and stock purchase plan (in shares)			10,681
Stock issued under dividend reinvestment and stock purchase plan	$ 446		$ 1	445
Stock options exercised (in shares)	92,054		92,054
Stock options exercised	$ 2,082		$ 12	2,070
Stock redeemed (in shares)			(31,441)
Stock redeemed	(1,257)		$ (4)	(1,253)
Ending balance (in shares) at Jun. 30, 2017		125	43,153,509
Ending balance at Jun. 30, 2017	$ 1,035,116	$ 125	$ 5,394	$ 593,904	$ 434,309	$ 1,384