Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 65,606	$ 116,442
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for credit losses	63,600	10,125
Depreciation and amortization of premises and equipment	14,331	13,924
Amortization of TCI	15,237	16,311
Net amortization of investment securities premiums	5,599	4,359
Investment securities gains, net	(3,051)	(241)
Gain on sales of mortgage loans held for sale	(22,728)	(8,302)
Proceeds from sales of mortgage loans held for sale	584,924	375,306
Originations of mortgage loans held for sale	(601,783)	(385,659)
Amortization of intangible assets	264	214
Amortization of issuance costs and discounts on long-term debt	543	421
Stock-based compensation	3,530	3,348
Other changes, net	(161,412)	(67,400)
Total adjustments	(100,946)	(37,594)
Net cash (used in) provided by operating activities	(35,340)	78,848
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of securities AFS	187,819	283,952
Proceeds from principal repayments and maturities of HTM securities	40,374	40,058
Proceeds from principal repayments and maturities of securities AFS	147,551	113,154
Purchase of securities AFS	(418,395)	(538,629)
Sale (purchase) of FRB and FHLB stock	6,380	(17,965)
Net increase in loans	(1,882,433)	(205,404)
Net change in tax credit investments	(13,881)	(22,695)
Net cash paid for acquisition	0	(3,907)
Net change in tax credit investments	4,873	11,092
Net cash used in investing activities	(1,937,458)	(362,528)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase (decrease) in demand and savings deposits	2,678,900	(228,999)
Net (decrease) increase in time deposits	(188,604)	241,735
(Decrease) increase in short-term borrowings	(310,690)	433,613
Additions to long-term debt	495,898	105,000
Repayments of long-term debt	(83,015)	(110,132)
Net proceeds from issuance of common stock	3,198	1,653
Dividends paid	(42,333)	(42,680)
Acquisition of treasury stock	(39,748)	(63,386)
Net cash provided by financing activities	2,513,606	336,804
Net Increase in Cash and Cash Equivalents	540,808	53,124
Cash and Cash Equivalents at Beginning of Period	517,791	445,687
Cash and Cash Equivalents at End of Period	1,058,599	498,811
Cash paid during the period for:
Interest	63,837	88,186
Income taxes	$ 11,051	$ 4,932