Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 94,974	$ 73,091
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of investment premiums, net	15,320	27,984
Gain on sale of investment securities, net	(1,878)	(18)
Loss (gain) on sale of non-covered other real estate owned	267	(751)
Gain on sale of covered other real estate owned	34	(549)
Valuation adjustment on non-covered other real estate owned	164	448
Valuation adjustment on covered other real estate owned	42	703
Provision for non-covered loan and lease losses	35,230	12,989
Recapture of provision for covered loan losses	(230)	(4,744)
Proceeds from bank owned life insurance	681	1,173
Change in cash surrender value of bank owned life insurance	(4,008)	(3,618)
Change in FDIC indemnification asset	13,169	19,841
Depreciation, amortization and accretion	24,498	13,292
Increase in mortgage servicing rights	(16,583)	(15,182)
Change in residential mortgage servicing rights carried at fair value	8,393	757
Change in junior subordinated debentures carried at fair value	4,082	1,637
Stock-based compensation	11,597	3,531
Net (increase) decrease in trading account assets	724	(265)
Gain on sale of loans	(63,729)	(52,899)
Change in loans held for sale carried at fair value	(6,894)	11,099
Origination of loans held for sale	(1,577,920)	(1,368,902)
Proceeds from sales of loans held for sale	1,692,936	1,614,097
Excess tax benefits from the exercise of stock options	(2,046)	(40)
Change in other assets and liabilities:
Net decrease in other assets	19,949	37,625
Net increase in other liabilities	23,203	(11,983)
Net cash provided by operating activities	271,975	359,316
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of investment securities available for sale	(346,844)	(51,191)
Payments to Acquire Held-to-maturity Securities	0	2,126
Proceeds from investment securities available for sale	1,116,539	702,910
Proceeds from investment securities held to maturity	566	1,073
Redemption of restricted equity securities	4,190	1,999
Net non-covered loan and lease originations	(867,149)	(352,390)
Net covered loan and lease paydowns	77,358	68,819
Proceeds from sales of non-covered loans	284,274	60,298
Proceeds from insurance settlement on loss of property	0	575
Proceeds from disposals of furniture and equipment	1,923	330
Purchases of premises and equipment	(43,761)	(25,575)
Net proceeds from FDIC indemnification asset	(2,359)	4,621
Proceeds from sales of non-covered other real estate owned	10,626	13,940
Proceeds from sales of covered other real estate owned	1,142	9,794
Net cash paid in branch divestiture	(127,557)	0
Cash acquired in merger, net of cash consideration paid	(116,867)	149,658
Net cash used by investing activities	225,815	283,419
CASH FLOWS FROM FINANCING ACTIVITIES:
Net decrease in deposit liabilities	739,173	(311,708)
Net increase in securities sold under agreements to repurchase	(470,261)	78,235
Repayment of term debt	(47,003)	(211,204)
Repayment of junior subordinated debentures	0	(8,764)
Dividends paid on common stock	(66,557)	(33,837)
Excess tax benefits from stock based compensation	2,046	40
Proceeds from stock options exercised	5,161	2,511
Retirement of common stock	(7,062)	(4,704)
Net cash provided (used by) financing activities	155,497	(489,431)
Net increase in cash and cash equivalents	653,287	153,304
Cash and cash equivalents, beginning of period	790,423	543,787
Cash and cash equivalents, end of period	1,443,710
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Interest	38,955	32,419
Income taxes	6,622	27,711
SUPPLEMENTAL DISCLOSURE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Change in unrealized gains on investment securities available for sale, net of taxes	11,504	(21,216)
Change in unrealized losses on investment securities held to maturity related to factors other than credit, net of taxes	57	43
Cash dividend declared on common stock and payable after period-end	32,684
Transfer of non-covered loans to non-covered other real estate owned	12,271	14,747
Transfer of covered loans to covered other real estate owned	1,818	2,554
Transfer of covered loans to non-covered loans	9,484	13,366
Transfer from FDIC indemnification asset to due from FDIC and other	2,194	3,530
Assets acquired, including goodwill of $1,021,102	9,876,718	376,071
Liabilities assumed	$ 8,765,353	$ 219,961