Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 116,442	$ 84,677
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	10,125	37,087
Depreciation and amortization of premises and equipment	13,924	14,580
Amortization of tax credit investments	16,311	16,729
Net amortization of investment securities premiums	4,359	4,856
Investment securities gains, net	(241)	(23)
Gain on sales of mortgage loans held for sale	(8,302)	(6,499)
Proceeds from sales of mortgage loans held for sale	375,306	379,399
Originations of mortgage loans held for sale	(385,659)	(377,268)
Amortization of intangible assets	214	0
Amortization of issuance costs and discounts on long-term debt	421	399
Stock-based compensation	3,348	4,184
Increase in accrued interest receivable	(4,105)	(2,298)
Increase in other assets	(217,816)	(10,687)
Increase in accrued interest payable	(1,311)	(1,024)
Increase (decrease) in other liabilities	155,832	(9,278)
Total adjustments	(37,594)	50,157
Net cash provided by operating activities	78,848	134,834
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales of securities available for sale	283,952	48,731
Proceeds from principal repayments and maturities of securities held to maturity	40,058	0
Proceeds from principal repayments and maturities of securities available for sale	113,154	170,141
Purchase of securities available for sale	(538,629)	(306,713)
Purchase of Federal Reserve Bank and Federal Home Loan Bank stock	(17,965)	(5,954)
Net increase in loans and leases	(205,404)	(65,361)
Net change in tax credit investments	(22,695)	(21,973)
Net cash paid for acquisition	(3,907)	0
Net change in tax credit investments	11,092	38,544
Net cash used in by investing activities	(362,528)	(219,673)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net decrease in demand and savings deposits	(228,999)	(265,298)
Net increase in time deposits	241,735	67,565
Increase in short-term borrowings	433,613	366,309
Additions to long-term debt	105,000	50,000
Repayments of long-term debt	(110,132)	(100,081)
Net proceeds from issuance of common stock	1,653	2,455
Dividends paid	(42,680)	(40,378)
Acquisition of treasury stock	(63,386)	0
Net cash provided by financing activities	336,804	80,572
Net Increase (Decrease) in Cash and Cash Equivalents	53,124	(4,267)
Cash and Cash Equivalents at Beginning of Period	445,687	402,096
Cash and Cash Equivalents at End of Period	498,811	397,829
Cash paid during the period for:
Interest	88,186	57,496
Income taxes	$ 4,932	$ 5,794