Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
NET EARNINGS	$ 72,152	$ 54,854
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	6,433	6,209
PROVISION FOR LOAN LOSSES	2,415	3,675
Securities premium amortization (discount accretion), net	14,109	15,592
Gain on sale of assets, net	(1,245)	(523)
Deferred federal income tax benefit	(908)	(614)
Change in loans held-for-sale	(9,009)	8,572
Change in other assets	(1,192)	4,210
Change in other liabilities	6,218	5,533
Total adjustments	16,821	42,654
Net cash provided by operating activities	88,973	97,508
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash received in acquisition of Commercial Bancshares, Inc.	18,653
Net decrease in interest-bearing time deposits in banks		249
Activity in available-for-sale securities:
Sales	149,125	36,971
Maturities	3,208,139	604,582
Purchases	(3,471,387)	(741,922)
Activity in held-to-maturity securities - maturities		17
Net increase in loans	(80,480)	(85,212)
Purchases of bank premises and equipment and other assets	(8,544)	(7,705)
Proceeds from sale of bank premises and equipment and other assets	776	599
Net cash used in investing activities	(183,718)	(192,421)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in noninterest-bearing deposits	(97,737)	138,717
Net increase in interest-bearing deposits	3,481	9,353
Net increase (decrease) in borrowings	125,935	(66,446)
Common stock transactions:
Proceeds from stock issuances	2,319	1,115
Dividends paid	(25,434)	(23,801)
Net cash provided by (used in) financing activities	8,564	58,938
NET DECREASE IN CASH AND CASH EQUIVALENTS	(86,181)	(35,975)
CASH AND CASH EQUIVALENTS, beginning of period	372,347	256,486
CASH AND CASH EQUIVALENTS, end of period	286,166	220,511
SUPPLEMENTAL INFORMATION AND NONCASH TRANSACTIONS:
Interest paid	8,074	3,921
Federal income taxes paid	12,762	13,348
Transfer of loans and bank premises to other real estate	126	1,916
Investment securities purchased but not settled		4,325
Restricted stocks grant to directors and officers	523	$ 600
Stock issued in acquisition of Commercial Bancshares, Inc.	$ 58,087

Sales of company common stock through the incentive stock option plan.

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Aggregate cash proceeds received from a combination of transactions that are classified as investing activities in which assets, which may include one or more investments, are sold to third-party buyers. This element can be used by entities to aggregate proceeds from all asset sales that are classified as investing activities.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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Amount of expense related to loss from loan transactions.

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The fair value of stock issued in noncash financing activities.

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Value transferred from mortgage loans to real estate owned (REO) in noncash transactions.

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