Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash Flows From Operating Activities
Net income	$ 59,701	$ 61,326
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	8,603	4,500
Gains on sales of loans	(8,957)	(4,900)
Proceeds from sales of loans	287,295	176,029
Loans originated for sale	(299,156)	(171,245)
Net gains from sales/writedowns of other real estate and repossessed assets	(3,150)	(2,428)
Depreciation of premises and equipment	8,925	8,182
Amortization of intangible assets	6,736	9,405
Net gains on sale of investment securities	(53)	(612)
Valuation change in loan servicing rights	1,558	(200)
Additions to loan servicing rights	(2,422)	(1,118)
Share-based compensation expense	5,211	4,254
Share-based compensation expense	6,454	2,507
Deferred income tax expense (benefit)	7,052	(2,900)
Net (increase) decrease in interest receivable and other assets	(37,836)	(19,075)
Net decrease in interest payable and other liabilities	(35,081)	(8,438)
Net cash provided by operating activities	4,880	55,287
Investment securities – available-for-sale:
Proceeds from sales	7,820	37,897
Proceeds from maturities, calls and principal reductions	157,125	140,260
Purchases	(104,657)	0
Investment securities – held-to-maturity:
Proceeds from maturities, calls and principal reductions	71,226	72,071
Purchases	(124,492)	(254,695)
Net increase in loans	(575,963)	(434,767)
Proceeds from sales of other real estate and repossessed assets	10,989	13,277
Purchases of premises and equipment, net of disposals	(10,196)	(5,074)
Cash acquired, net of cash paid, in business combinations	325,714	16,551
Net cash used in investing activities	(242,434)	(414,480)
Cash Flows From Financing Activities
Net increase in interest- and noninterest-bearing demand deposits and savings accounts	734,330	594,058
Net decrease in time deposits	(213,105)	(126,902)
Net increase (decrease) in securities sold under agreements to repurchase with customers and other short-term borrowings	9,886	(98,451)
Proceeds from issuance of long-term borrowings	275,000	125,000
Repayment of long-term borrowings	(223,018)	0
Cash dividends paid	(30,293)	(26,981)
Proceeds from directors’ stock plans and exercise of stock options, net of shares withheld	3,595	1,550
Cash paid for payroll taxes upon conversion of share-based awards	(1,063)	(564)
Net cash provided by financing activities	555,332	467,710
Net increase (decrease) in cash and cash equivalents	317,778	108,517
Cash and cash equivalents at beginning of period	238,789	183,020
Cash and cash equivalents at end of period	556,567	291,537
Supplemental Disclosure of Cash Flow Information:
Interest paid	13,810	11,655
Loans transferred to other real estate and repossessed assets	6,029	7,411
Closed branch offices transferred to other assets	2,136	455
Income taxes paid	22,200	33,450
Fair value of tangible assets acquired (non-cash)	6,374,784	1,284,552
Goodwill, loans servicing rights and other identifiable intangible assets acquired	905,160	116,478
Liabilities assumed	6,100,847	1,257,917
Common stock issued	$ 1,504,811	$ 159,904