Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net earnings	$ 266,519	$ 227,778
Depreciation and amortization	66,114	33,239
Provision for credit losses	42,514	31,709
(Gain) loss on sale of foreclosed assets	(837)	42
Provision for losses on foreclosed assets	0	5,163
Gain on sale of loans and leases	(790)	(190)
Gain on sale of premises and equipment	(23)	(54)
Gain on sale of securities	(8,970)	(3,744)
Unrealized gain on derivatives and foreign currencies, net	(374)	(909)
Earned stock compensation	17,275	11,836
Loss on sale of leasing unit	720	0
Tax effect included in stockholders' equity of restricted stock vesting	(4,226)	(596)
Decrease in accrued and deferred income taxes, net	74,946	108,553
Decrease in other assets	2,070	15,786
Decrease in accrued interest payable and other liabilities	(23,600)	(25,336)
Net cash provided by operating activities	431,338	403,277
Cash flows from investing activities:
Net increase in loans and leases	(514,224)	(612,008)
Proceeds from sales of loans and leases	106,109	10,557
Proceeds from maturities and paydowns	184,644	93,389
Proceeds from sales	392,841	212,169
Purchases	(303,742)	(557,769)
Net redemptions of Federal Home Loan Bank stock	324	23,359
Proceeds from sales of foreclosed assets	7,973	18,772
Purchases of premises and equipment, net	(6,185)	(5,872)
Proceeds from sales of premises and equipment	24	108
Proceeds from sale of leasing unit	138,955	0
Proceeds from BOLI death benefit	1,853	0
Net increase of equipment leased to others under operating leases	(15,802)	(26,174)
Net cash used in investing activities	(7,230)	(843,469)
Cash flows from financing activities:
Noninterest-bearing	352,784	573,101
Interest-bearing	(371,005)	(216,717)
Net (decrease) increase in borrowings	(78,873)	169,095
Common stock repurchased	(4,611)	(8,391)
Tax effect included in stockholders' equity of restricted stock vesting	4,226	596
Cash dividends paid	(182,750)	(154,424)
Net cash (used in) provided by financing activities	(280,229)	363,260
Net increase (decrease) in cash and cash equivalents	143,879	(76,932)
Cash and cash equivalents, beginning of period	396,486	313,226
Cash and cash equivalents, end of period	540,365	236,294
Supplemental disclosures of cash flow information:
Cash paid for interest	41,392	51,218
Cash paid for income taxes	82,721	13,760
Loans transferred to foreclosed assets	129	13,472
Partnership interest transferred to equipment leased to others under operating leases	$ 0	$ 20,833