Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:
Net income	$ 91,037	$ 92,353
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,562	14,639
Stock-based compensation	5,582	4,743
Provision for credit losses	(2,096)	9,655
Net amortization of premiums and accretion of discounts on securities and borrowings	18,324	19,025
Amortization of other intangible assets	6,898	5,794
Gains on securities transactions, net	(102)	(4,008)
Proceeds from sales of loans held for sale	75,182	1,031,767
Gains on sales of loans, net	(1,497)	(32,155)
Originations of loans held for sale	(67,483)	(901,624)
(Gains) losses on sales of assets, net	(211)	600
FDIC loss-share receivable (excluding reimbursements)	11,610	7,180
Net change in:
Trading securities	78	7,887
Fair value of borrowings carried at fair value	0	275
Cash surrender value of bank owned life insurance	(4,593)	(4,318)
Accrued interest receivable	419	(513)
Other assets	57,493	39,877
Accrued expenses and other liabilities	(36,048)	(23,354)
Net cash provided by operating activities	169,155	267,823
Cash flows from investing activities:
Net loan originations	(495,941)	(186,038)
Loans purchased	(128,684)	(231,008)
Investment securities held to maturity:
Purchases	(358,393)	(509,223)
Maturities, calls and principal repayments	268,868	394,003
Investment securities available for sale:
Purchases	(20,830)	(283,736)
Sales	5,447	4,401
Maturities, calls and principal repayments	106,323	153,421
Death benefit proceeds from bank owned life insurance	0	1,821
Proceeds from sales of real estate property and equipment	16,317	15,480
Purchases of real estate property and equipment	(18,106)	(9,458)
Reimbursements from the FDIC	4,967	2,138
Net cash used in investing activities	(620,032)	(648,199)
Cash flows from financing activities:
Net change in deposits	542,225	(143,907)
Net change in short-term borrowings	16,264	3,960
Advances of long-term borrowings	0	125,000
Repayments of long-term borrowings	0	(1,000)
Redemption of junior subordinated debentures	0	15,000
Cash dividends paid to common shareholders	(66,047)	(96,870)
Common stock issued, net	2,721	5,494
Net cash provided by (used in) financing activities	495,163	(122,323)
Net change in cash and cash equivalents	44,286	(502,699)
Cash and cash equivalents at beginning of year	369,168	853,100
Cash and cash equivalents at end of period	413,454	350,401
Supplemental disclosures of cash flow information:
Interest on deposits and borrowings	120,086	129,502
Federal and state income taxes	28,669	15,267
Supplemental schedule of non-cash investing activities:
Transfer of loans to other real estate owned	9,053	16,589
Transfer of loans to loans held for sale	$ 27,329	$ 0