Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net earnings	$ 352,166	$ 299,619	$ 168,905
Depreciation and amortization	32,884	24,885	20,420
Accretion (Amortization) of Discounts and Premiums, Investments	39,797	19,675	12,465
Intangible asset amortization	16,517	9,410	6,268
Provision for credit losses	65,729	45,481	11,499
Gain on sale of foreclosed assets, net	(837)	(2,967)	(3,413)
Provision for losses on foreclosed assets	2,576	5,228	7,307
Gain on sale of loans and leases, net	(909)	(373)	(601)
Loss (gain) on sale of premises and equipment	78	(28)	(1,520)
Gain on sale of securities, net	(9,485)	(3,744)	(4,841)
Gain (Loss) on Sale of Insurance Block	(539)	0	0
Unrealized gain on derivatives and foreign currencies, net	(202)	(160)	(3,487)
Earned stock compensation	23,319	15,630	36,474
Gain (Loss) on Sale of Capital Leases, Net	720	0	0
Write-off of goodwill relating to the asset financing reorganization	0	0	6,645
Tax effect included in stockholders' equity of restricted stock vesting	(4,406)	(841)	(4,625)
Decrease in deferred income taxes, net	53,556	149,664	92,257
Decrease in other assets	6,441	48,172	49,498
Increase (decrease) in accrued interest payable and other liabilities	3,702	(15,773)	(61,141)
Net cash provided by operating activities	581,107	593,878	332,110
Cash flows from investing activities:
Cash acquired in acquisitions, net of cash consideration paid	0	260,936	346,047
Proceeds (Net Cash Used) From Branch Sale	(178,792)	0	0
Net increase in loans and leases	(1,257,734)	(1,105,925)	(782,424)
Proceeds from sales of loans and leases	121,053	31,993	66,596
Proceeds from maturities and paydowns of securities available-for-sale	250,170	144,847	123,949
Proceeds from sales of securities available-for-sale	393,509	1,035,926	465,608
Purchases of securities available-for-sale	(375,261)	(992,680)	(236,739)
Collection of securities sales proceeds	0	0	484,084
Net (purchases) redemptions of Federal Home Loan Bank stock	(2,160)	23,686	33,390
Proceeds from sales of foreclosed assets	8,186	32,812	24,464
Purchases of premises and equipment, net	(8,183)	(8,929)	(2,669)
Proceeds from sales of premises and equipment	24	146	3,759
Proceeds from Sale and Collection of Lease Receivables	138,955	0	0
Proceeds from Life Insurance Policies	3,238	0	0
Net (increase) decrease of equipment leased to others under operating leases	(51,557)	(65,309)	30,493
Net cash (used in) provided by investing activities	(958,552)	(642,497)	556,558
Cash flows from financing activities:
Net increase in noninterest-bearing deposits	490,997	685,742	506,533
Net decrease in interest-bearing deposits	(104,021)	(569,706)	(375,185)
Net increase in borrowings	285,928	238,512	269,741
Common stock repurchased and restricted stock surrendered	(33,244)	(8,400)	(22,307)
Repayment of acquired debt	0	0	(992,109)
Tax effect included in stockholders' equity of restricted stock vesting	4,406	841	4,625
Cash dividends paid, net	(243,437)	(215,110)	(114,162)
Net cash provided by (used in) financing activities	400,629	131,879	(722,864)
Net increase in cash and cash equivalents	23,184	83,260	165,804
Cash and cash equivalents, beginning of year	396,486	313,226	147,422
Cash and cash equivalents, end of year	419,670	396,486	313,226
Supplemental disclosures of cash flow information:
Cash paid for interest	54,389	65,868	34,788
Cash paid (received) for income taxes	133,897	16,602	(1,198)
Loans transferred to foreclosed assets	781	13,472	9,806
Partnership interest transferred to equipment leased to others under operating leases	0	20,833	0
Common stock issued in acquisitions	$ 0	$ 797,433	$ 2,594,070