CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating activities:
Net income	$ 13,632	$ 12,404
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan and lease losses	804	757
Depreciation of premises and equipment	1,189	1,148
Depreciation of equipment owned and leased to others	3,249	3,225
Amortization of investment security premiums and accretion of discounts, net	1,044	942
Amortization of mortgage servicing rights	286	480
Deferred income taxes	(905)	433
Gains on investment securities available-for-sale	(963)	0
Originations of loans held for sale, net of principal collected	(22,470)	(26,885)
Proceeds from the sales of loans held for sale	18,373	28,308
Net gain on sale of loans held for sale	(785)	(1,178)
Change in trading account securities	0	(16)
Change in interest receivable	(714)	(1,339)
Change in interest payable	100	856
Change in other assets	3,433	865
Change in other liabilities	905	(728)
Other	1,271	112
Net change in operating activities	18,449	19,384
Investing activities:
Proceeds from sales of investment securities	1,236	0
Proceeds from maturities of investment securities	64,251	65,273
Purchases of investment securities	(69,412)	(47,367)
Loans sold or participated to others	689	8,109
Net change in loans and leases	(33,676)	(54,653)
Net change in equipment owned under operating leases	(750)	(4,509)
Purchases of premises and equipment	(421)	(1,761)
Net change in investing activities	(38,083)	(34,908)
Financing activities:
Net change in demand deposits, NOW accounts and savings accounts	(6,167)	(33,078)
Net change in certificates of deposit	60,940	89,297
Net change in short-term borrowings	(16,484)	(54,311)
Proceeds from issuance of long-term debt	5,647	4,912
Payments on long-term debt	(6,096)	(9,189)
Net proceeds from issuance of treasury stock	1,237	3,249
Acquisition of treasury stock	(1,401)	(566)
Cash dividends paid on common stock	(4,267)	(4,267)
Net change in financing activities	33,409	(3,953)
Net change in cash and cash equivalents	13,775	(19,477)
Cash and cash equivalents, beginning of year	80,052	83,934
Cash and cash equivalents, end of period	93,827	64,457
Non-cash transactions:
Loans transferred to other real estate and repossessed assets	5,444	822
Common stock matching contribution to Employee Stock Ownership and Profit Sharing Plan	$ 0	$ 2,801