Consolidated Statements of Cash Flows - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019
OPERATING ACTIVITIES
Net income		$ 57,090	$ 114,703
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	[1],[2]	109,500	23,350
Net (accretion) amortization of premiums and discounts from acquisition		(176)	273
Depreciation and amortization		31,054	27,316
Deferred income tax benefit		(16,990)	(564)
Net increase in trading securities and other earning assets		(8,593)	(22,779)
(Gains) losses on sales of securities available for sale, net		(5,233)	594
Gains on sales of assets		(1,767)	(612)
Amortization of securities premiums, net of discount accretion		19,990	17,321
Originations of loans held for sale		(298,732)	(54,857)
Gains on sales of loans held for sale, net		(810)	(436)
Proceeds from sales of loans held for sale		299,132	55,714
Equity-based compensation		6,702	7,610
Net tax benefit related to equity compensation plans		279	563
Changes in:
Accrued income		(2,454)	(14,228)
Accrued expenses and taxes		22,535	43,198
Other assets and liabilities, net		(109,842)	(63,201)
Net cash provided by operating activities		101,685	133,965
INVESTING ACTIVITIES
Proceeds from maturities of securities held to maturity		59,020	58,137
Proceeds from sales of securities available for sale		250,609	144,735
Proceeds from maturities of securities available for sale		1,263,352	535,514
Purchases of securities held to maturity		(60,856)	(8,141)
Purchases of securities available for sale		(2,297,717)	(1,111,831)
Payment on low-income housing tax credit investment commitments		(5,482)	(1,363)
Net increase in loans		(1,888,618)	(746,789)
Net decrease in fed funds sold and resell agreements		230,702	343,398
Net cash activity from acquisitions and divestitures		24
Net decrease (increase) in interest bearing balances due from other financial institutions		550	(4,747)
Purchases of premises and equipment		(35,361)	(22,827)
Proceeds from sales of premises and equipment		8,420	3,865
Proceeds from bank-owned and company-owned life insurance death benefit		1,474
Net cash used in investing activities		(2,473,883)	(810,049)
FINANCING ACTIVITIES
Net increase in demand and savings deposits		3,290,366	260,698
Net decrease in time deposits		(434,206)	(141,728)
Net increase in fed funds purchased and repurchase agreements		67,186	189,964
Proceeds from short-term debt		15,000
Cash dividends paid		(30,040)	(29,497)
Proceeds from exercise of stock options and sales of treasury shares		2,779	2,260
Purchases of treasury stock		(59,459)	(4,114)
Net cash provided by financing activities		2,851,626	277,583
Increase (decrease) in cash and cash equivalents		479,428	(398,501)
Cash and cash equivalents at beginning of period		1,669,170	1,674,121
Cash and cash equivalents at end of period		2,148,598	1,275,620
Supplemental disclosures:
Income tax payments		17,399	606
Total interest payments		59,584	95,511
Noncash disclosures:
Acquisition of low-income housing tax credit investments		47,172	6,765
Commitment to fund low-income housing tax credit investments		$ 47,172	$ 6,765

[1] For the six months ended June 30, 2019, this line represents the Provision for loan losses. See further discussion of this change in Note 3, “New Accounting Pronouncements.

[2] For the three and six months ended June 30, 2019, this line represents the Provision for loan losses. See further discussion of this change in Note 3, “New Accounting Pronouncements.