Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating activities
Net income	$ 7,649	$ 13,650
Adjustments to reconcile net income to net cash provided by operating activities
Provision for loan and lease losses	5,658	4,471
Depreciation and amortization of premises and equipment	1,791	1,489
Net accretion on securities	1,091	644
Amortization of intangible assets	851	819
Stock based compensation	1,964	2,007
Bank owned life insurance income	(849)	(971)
Purchases of trading securities	(744)	(496)
Unrealized gains on trading securities	(100)	(178)
Deferred income tax benefit	(309)	(1,706)
Proceeds from sales of loans held for sale	15,417	14,026
Originations and purchases of loans held for sale	(17,307)	(15,239)
Net gains on sales of loans held for sale	(480)	(441)
Net security gains	(1,145)	(455)
Net gain on sales of other real estate owned	(151)	(247)
Net (increase) decrease in other assets	915	5,032
Net decrease in other liabilities	(9,336)	(7,836)
Net cash (used by) provided by operating activities	4,915	14,569
Investing activities
Net cash provided by acquisitions	81,049	48,340
Securities available for sale:
Proceeds from maturities, calls, and principal paydowns	109,986	100,340
Proceeds from sales	2,607	1,791
Purchases	(119,749)	(100,624)
Securities held to maturity:
Proceeds from maturities, calls, and principal paydowns	6,940	6,406
Purchases	(3,131)	(6,010)
Proceeds from FRB Stock	1,989	0
Net increase in loans	(17,791)	(18,940)
Purchases of premises and equipment	(1,006)	(1,502)
Proceeds from sales of other real estate owned	1,023	637
Net cash provided by investing activities	61,917	30,438
Financing activities
Net increase in deposits	118,194	146,348
Net increase (decrease) in short-term borrowings	1,326	(15,615)
Repayments of long-term debt	(43,757)	(4)
Issuance of long-term debt	0	150
Excess tax benefit from exercise of stock options	(17)	70
Proceeds from the issuance of shares to employee benefit plans and other stock plans	(342)	915
Purchase of treasury stock	0	0
Cash dividends and payment for fractional shares	(6,758)	(6,648)
Net cash provided by financing activities	68,646	125,216
Net increase in cash and cash equivalents	135,478	170,223
Cash and cash equivalents at beginning of period	163,668	129,381
Cash and cash equivalents at end of period	299,146	299,604
Cash paid during the period for:
Interest	8,000	8,976
Income taxes paid	344	1,970
Noncash investing activities:
Loans transferred to OREO	959	184
Acquisitions:
Fair value of assets acquired	1,503,448	5,976
Fair value of liabilities assumed	1,283,676	54,316
Fair value of debt issued in purchase combination	$ 0	$ 150