CONSOLIDATED CONDENSED STATEMENT OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Preferred	Common Stock	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2014	$ 726,827	$ 125	$ 4,709	$ 431,220	$ 292,403	$ (1,630)
Beginning balance (in shares) at Dec. 31, 2014		125	37,669,948
Comprehensive Income
Net income	16,172				16,172
Other comprehensive income, net of tax	(285)					(285)
Cash dividends on common stock ($.08 per share)	(3,049)				(3,049)
Share-based compensation (in shares)			126,531
Share-based compensation	517		16	501
Stock issued under employee benefit plans (in shares)			6,678
Stock issued under employee benefit plans	129		1	128
Stock issued under dividend reinvestment and stock purchase plan (in shares)			5,615
Stock issued under dividend reinvestment and stock purchase plan	135		1	134
Stock options exercised (in shares)	23,373		23,373
Stock options exercised	369		3	366
Stock redeemed (in shares)			(50,657)
Stock redeemed	(1,157)		(7)	(1,150)
Ending balance at Mar. 31, 2015	$ 739,658	$ 125	$ 4,723	$ 431,199	$ 305,526	$ (1,915)
Ending balance (in shares) at Mar. 31, 2015		125	37,781,488