CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash Flow From Operating Activities:
Net income	$ 36,679	$ 23,193
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	2,500	2,385
Depreciation and amortization	2,213	1,830
Change in deferred taxes	957	3,019
Share-based compensation	875	573
Loans originated for sale	(92,887)	(46,280)
Proceeds from sales of loans held for sale	96,973	48,903
Gains on sales of loans held for sale	(1,339)	(956)
Gains on sales of securities available for sale	(1,609)	(598)
Increase in cash surrender of life insurance	(1,078)	(898)
Gains on life insurance benefits	(98)
Change in interest receivable	1,907	1,020
Change in interest payable	986	765
Other adjustments	(15,082)	2,372
Net cash provided by operating activities	30,997	35,328
Cash Flows from Investing Activities:
Net change in interest-bearing deposits	10,794	4,020
Purchases of:
Securities available for sale	(98,113)	(68,819)
Securities held to maturity		(7,438)
Proceeds from sales of securities available for sale	55,695	26,169
Proceeds from maturities of:
Securities available for sale	15,764	15,374
Securities held to maturity	20,092	18,076
Change in Federal Home Loan Bank stock	(763)
Net change in loans	(153,893)	(136,141)
Proceeds from the sale of other real estate owned	820	1,228
Proceeds from life insurance benefits	2,784
Other adjustments	1,051	1,291
Net cash used in investing activities	(145,769)	(146,240)
Net change in :
Demand and savings deposits	108,446	(1,047)
Certificates of deposit and other time deposits	46,659	79,858
Borrowings	737,347	480,059
Repayment of borrowings	(794,004)	(465,826)
Cash dividends on common stock	(8,912)	(6,191)
Stock issued under employee benefit plans	159	114
Stock issued under dividend reinvestment and stock purchase plans	250	205
Stock options exercised	535	1,314
Stock redeemed	(1,785)	(1,254)
Net cash provided by financing activities	88,695	87,232
Net Change in Cash and Cash Equivalents	(26,077)	(23,680)
Cash and Cash Equivalents at beginning of period	154,905	127,927
Cash and Cash Equivalents at end of period	128,828	104,247
Additional cash flow information:
Interest paid	12,718	6,470
Income tax paid (refunded)	(257)
Loans transferred to other real estate owned	131	680
Non-cash investing activities using trade date accounting	$ 601	$ 8,162