Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
NET EARNINGS	$ 78,108	$ 75,189
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	8,627	8,069
PROVISION FOR LOAN LOSSES	8,219	5,508
Securities premium amortization (discount accretion), net	21,275	20,493
Gain on sale of assets, net	(1,767)	(379)
Deferred federal income tax expense (benefit)	825	(1,487)
Change in loans held for sale	1,952	(12,801)
Change in other assets	10,059	(9,655)
Change in other liabilities	530	8,983
Total adjustments	49,720	18,731
Net cash provided by operating activities	127,828	93,920
CASH FLOWS FROM INVESTING ACTIVITIES:
Cash paid for asset acquisition of 4Trust Mortgage, Inc.		(1,931)
Cash received in acquisition of FBC Bancshares, Inc.		65,197
Net decrease in interest-bearing time deposits in banks	1,788	12,511
Activity in available-for-sale securities:
Sales	20,792	34,541
Maturities	2,830,522	2,189,905
Purchases	(2,835,964)	(2,501,587)
Activity in held-to-maturity securities - maturities	148	155
Net increase in loans	(27,446)	(91,259)
Purchases of bank premises and equipment and other assets	(17,151)	(12,437)
Proceeds from sale of other assets	2,960	727
Net cash used in investing activities	(24,351)	(304,178)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in noninterest-bearing deposits	(42,959)	(2,096)
Net decrease in interest-bearing deposits	88,254	5,540
Net increase (decrease) in short-term borrowings	(101,916)	120,668
Common stock transactions:
Proceeds from stock issuances	989	1,290
Dividends paid	(33,016)	(28,217)
Net cash (used in) provided by financing activities	(88,648)	97,185
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	14,829	(113,073)
CASH AND CASH EQUIVALENTS, beginning of period	272,886	253,471
CASH AND CASH EQUIVALENTS, end of period	287,715	140,398
SUPPLEMENTAL INFORMATION AND NONCASH TRANSACTIONS:
Interest paid	4,018	3,066
Federal income tax paid	21,631	22,179
Transfer of loans to foreclosed assets	1,905	97
Investment securities purchased but not settled	$ 4,521	$ 17,869