Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 26,047	$ 56,663
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for credit losses	44,030	5,100
Depreciation and amortization of premises and equipment	7,161	6,888
Amortization of TCI	7,619	8,155
Net amortization of investment securities premiums	2,707	2,075
Investment securities gains, net	(46)	(65)
Gain on sales of mortgage loans held for sale	(6,181)	(3,122)
Proceeds from sales of mortgage loans held for sale	195,649	142,739
Originations of mortgage loans held for sale	(192,285)	(140,286)
Amortization of intangible assets	132	107
Amortization of issuance costs and discounts on long-term debt	250	211
Stock-based compensation	1,619	1,560
Other changes, net	(133,579)	(41,754)
Total adjustments	(72,924)	(18,392)
Net cash (used in) provided by operating activities	(46,877)	38,271
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of securities AFS	59,894	37,660
Proceeds from principal repayments and maturities of securities HTM	19,758	18,687
Proceeds from principal repayments and maturities of securities AFS	61,408	51,097
Purchase of securities AFS	(390,936)	(143,588)
Purchase of FRB and FHLB stock	(21,567)	(6,250)
Net increase in loans	(250,993)	(101,123)
Net change in tax credit investments	(4,023)	(11,363)
Net cash paid for acquisition	0	(3,907)
Net change in tax credit investments	128	8,003
Net cash used in by investing activities	(526,587)	(166,790)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net decrease in demand and savings deposits	(34,866)	(108,185)
Net increase in time deposits	5,979	110,004
Net increase in short-term borrowings	503,567	74,239
Additions to long-term debt	496,461	75,000
Repayments of long-term debt	(13)	(2,026)
Net proceeds from issuance of common stock	2,001	1,657
Dividends paid	(21,348)	(20,592)
Acquisition of treasury stock	(39,748)	(5,877)
Net cash provided by financing activities	912,033	124,220
Net Increase (Decrease) in Cash and Cash Equivalents	338,569	(4,299)
Cash and Cash Equivalents at Beginning of Period	517,791	445,687
Cash and Cash Equivalents at End of Period	856,360	441,388
Cash paid during the period for:
Interest	36,576	40,695
Income taxes	$ 1,072	$ 1,485