Consolidated Statements of Cash Flows - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
Cash Flows from Operating Activities:
Net income		$ 194,823	$ 213,906
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses		622	14,285
Depreciation		13,771	16,549
Amortization of discounts and premiums, net		2,403	(3,095)
Net gain on securities		(7,480)
Gain on trading activity		(35)	(178)
Net loss (gain) on sales of loans		31	(178)
Stock-based compensation		15,813	18,714
Deferred tax expense		19,362	4,620
Changes in operating assets and liabilities:
(Decrease) increase in other assets	[1]	(31,751)	10,140
Increase in other liabilities	[2]	51,381	36,492
Purchases of securities held for trading		(22,500)	(113,615)
Proceeds from sales of securities held for trading		22,535	113,793
Proceeds from sales of loans originated for sale		0	35,258
Net cash provided by operating activities		258,975	346,691
Cash Flows from Investing Activities:
Proceeds from repayment of securities available for sale		507,198	416,555
Proceeds from sales of securities available for sale		363,346
Purchase of securities available for sale		(912,974)	(1,116,898)
Redemption of Federal Home Loan Bank stock		85,349	51,139
Purchases of Federal Home Loan Bank stock		(23,107)	(100,395)
Proceeds from bank-owned life insurance		2,664	9,457
Proceeds from sales of loans		70,387	78,058
Other changes in loans, net		(790,541)	(1,149,413)
Dispositions (purchase) of premises and equipment, net		58	(7,619)
Net cash used in investing activities		(697,620)	(1,819,116)
Cash Flows from Financing Activities:
Net increase in deposits		1,568,096	453,682
Proceeds from long-term borrowed funds		1,504,820	3,450,000
Repayments of long-term borrowed funds		(2,631,000)	(2,570,000)
Cash dividends paid on common stock		(158,690)	(166,607)
Cash dividends paid on preferred stock		(16,414)	(16,414)
Treasury stock repurchased		(67,125)
Payments relating to treasury shares received for restricted stock award tax payments		(7,702)	(2,008)
Net cash provided by financing activities		191,985	1,148,653
Net decrease in cash, cash equivalents, and restricted cash		(246,660)	(323,772)
Cash, cash equivalents, and restricted cash at beginning of period		1,474,955	2,528,169
Cash, cash equivalents, and restricted cash at end of period		1,228,295	2,204,397
Supplemental information:
Cash paid for interest		380,540	280,653
Cash paid for income taxes		75,280	13,884
Non-cash investing and financing activities:
Transfers to repossessed assets from loans		3,027	2,461
Operating lease liabilities arising from obtaining right-of-use assets as of January 1, 2019		324,360
Transfer of loans from held for investment to held for sale		70,418	77,880
Dispositions of premises and equipment		1,245
Shares issued for restricted stock awards		$ 16,279	$ 8,879

[1] Includes $16.3 million of amortization of operating lease right-of-use assets for the six months ended June 30, 2019.

[2] Includes $16.3 million of amortization of operating lease liability for the six months ended June 30, 2019.