CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Operating activities:
Net income	$ 24,282	$ 25,473
Adjustments to reconcile net income to net cash provided (used) by operating activities:
Provision for loan and lease losses	4,309	2,265
Depreciation of premises and equipment	2,094	1,780
Depreciation of equipment owned and leased to others	8,114	9,600
Amortization of investment security premiums and accretion of discounts, net	1,999	965
Amortization of mortgage servicing rights	1,528	1,458
Mortgage servicing asset (recovery) impairment	(147)	16
Deferred income taxes	(3,996)	(755)
Investment securities and other investment gains	(403)	(1,272)
Originations of loans held for sale, net of principal collected	(96,948)	(40,963)
Proceeds from the sales of loans held for sale	94,491	66,258
Net gain on sale of loans held for sale	(2,736)	(500)
Change in trading account securities	(6)	(5)
Change in interest receivable	(312)	918
Change in interest payable	1,702	2,462
Change in other assets	7,894	8,347
Change in other liabilities	(4,542)	(734)
Other	586	2,620
Net change in operating activities	37,909	77,933
Investing activities:
Proceeds from sales of investment securities	40,236	126,805
Proceeds from maturities of investment securities	159,553	107,843
Purchases of investment securities	(169,504)	(160,641)
Net change in other investments	(960)	2,370
Loans sold or participated to others	15,494	11,010
Net change in loans and leases	(199,988)	(62,674)
Net change in equipment owned under operating leases	3,173	(8,564)
Purchases of premises and equipment	(3,082)	(5,589)
Net change in investing activities	(155,078)	10,560
Financing activities:
Net change in demand deposits, NOW accounts and savings accounts	92,814	(108,064)
Net change in certificates of deposit	(26,938)	8,635
Net change in short-term borrowings	8,694	(25,866)
Proceeds from issuance of long-term debt	25,600	10,554
Payments on long-term debt	(268)	(256)
Net proceeds from issuance of treasury stock	3,644	2,818
Acquisition of treasury stock	(2,617)	(2,139)
Repurchase of common stock warrant		(3,750)
Cash dividends paid on common stock	(8,007)	(7,948)
Net change in financing activities	92,922	(126,016)
Net change in cash and cash equivalents	(24,247)	(37,523)
Cash and cash equivalents, beginning of year	114,327	96,872
Cash and cash equivalents, end of period	90,080	59,349
Non-cash transactions:
Loans transferred to other real estate and repossessed assets	1,791	6,721
Common stock matching contribution to Employee Stock Ownership and Profit Sharing Plan	$ 2,643	$ 2,420