Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Operating activities
Net income	$ 56,561	$ 43,822
Adjustments to reconcile net income to net cash provided by operating activities
Provision for loan losses	12,647	17,258
Depreciation and amortization of premises and equipment	6,172	5,885
Net accretion on securities	2,692	4,082
Amortization of intangible assets	3,821	3,548
Stock based compensation	2,817	3,571
Increase in surrender value of bank owned life insurance	(3,455)	(2,648)
Purchases of trading securities	(1,618)	(1,022)
Unrealized gains on trading securities	(225)	(345)
Deferred income tax (benefit) expense	(1,654)	1,126
Proceeds from sales of loans held for sale	4,024	59,231
Originations and purchases of loans held for sale	(6,872)	(65,722)
Net gains on sales of loans held for sale	(3)	(1,168)
Net security gains	(59)	(1,413)
Net gain on sales of other real estate owned	(351)	(654)
Gain on sale of equity investment	(19,401)	0
Prepayment penalties on long-term debt	17,903	0
Net (increase) decrease in other assets	(17,463)	12,016
Net increase in other liabilities	3,239	8,694
Net cash provided by operating activities	58,775	86,261
Investing activities
Net cash used in acquisitions	0	80,909
Securities available for sale:
Proceeds from maturities, calls, and principal paydowns	178,430	314,104
Proceeds from sales	0	27,593
Purchases	(175,033)	(303,497)
Securities held to maturity:
Proceeds from maturities, calls, and principal paydowns	26,830	24,582
Purchases	(33,601)	(75,808)
Other:
Proceeds from FHLB stock redemption	63,186	0
Purchases of Federal Reserve and FHLB stock	(50,974)	(5,584)
Net increase in loans	(191,327)	(198,057)
Proceeds from settlement of bank owned life insurance	1,319	0
Purchases of premises and equipment	(6,616)	(3,409)
Proceeds from sales of equity investment	19,639	0
Proceeds from the sale of other real estate owned	2,863	3,470
Net cash used in investing activities	(165,284)	(135,697)
Financing activities
Net increase in deposits	424,715	105,369
Net (decrease) increase in short-term borrowings	(80,405)	188,689
Proceeds from long-term debt	120,051	0
Repayments of long-term debt	(315,721)	(163,409)
Proceeds from the issuance of shares to employee benefit plans and other stock plans	1,203	154
Purchase of treasury stock	(72)	(12,459)
Cash dividends and payment for fractional shares	(27,653)	(24,334)
Net cash provided by financing activities	122,118	94,010
Net increase in cash and cash equivalents	15,609	44,574
Cash and cash equivalents at beginning of period	158,926	163,668
Cash and cash equivalents at end of period	174,535	208,242
Cash paid during the period for:
Interest	18,714	24,335
Income taxes paid	36,978	12,885
Noncash investing activities:
Loans transferred to other real estate owned	1,135	785
Preferred stock acquired from sale of equity investment	2,762	0
Transfer of available for sale securities to held to maturity portfolio	332,115	0
Acquisitions:
Fair value of assets acquired	0	1,504,415
Fair value of liabilities assumed	$ 0	$ 1,284,632