CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating activities:
Net income	$ 42,561	$ 43,069
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan and lease losses	5,091	2,160
Depreciation of premises and equipment	3,897	3,517
Depreciation of equipment owned and leased to others	16,115	13,342
Stock-based compensation	2,036	2,953
Amortization of investment security premiums and accretion of discounts, net	4,594	3,433
Amortization of mortgage servicing rights	1,133	1,117
Deferred income taxes	82	(3,914)
Gains on investment securities available-for-sale	(790)	(4)
Originations of loans held for sale, net of principal collected	(88,161)	(90,381)
Proceeds from the sales of loans held for sale	80,474	97,402
Net gain on sale of loans held for sale	(2,474)	(2,604)
Net gain on sale of other real estate and repossessions	(154)	(818)
Change in trading account securities	0	205
Change in interest receivable	(1,204)	(666)
Change in interest payable	1,089	312
Change in other assets	7	(4,802)
Change in other liabilities	4,820	5,068
Other	(367)	1,200
Net change in operating activities	68,749	70,589
Investing activities:
Proceeds from sales of investment securities	5,139	1,299
Proceeds from maturities of investment securities	158,178	78,033
Purchases of investment securities	(199,056)	(75,757)
Net change in other investments	(485)	(927)
Loans sold or participated to others	0	1,962
Net change in loans and leases	(191,881)	(276,108)
Net change in equipment owned under operating leases	(23,627)	(34,984)
Purchases of premises and equipment	(5,532)	(4,612)
Proceeds from sales of other real estate and repossessions	1,523	6,788
Net change in investing activities	(255,741)	(304,306)
Financing activities:
Net change in demand deposits and savings accounts	211,917	140,737
Net change in time deposits	25,935	75,559
Net change in short-term borrowings	(17,222)	37,688
Proceeds from issuance of long-term debt	10,837	0
Payments on long-term debt	(5,928)	(924)
Stock issued under stock purchase plans	116	149
Acquisition of treasury stock	(8,030)	(8,208)
Cash dividends paid on common stock	(14,530)	(13,285)
Net change in financing activities	203,095	231,716
Net change in cash and cash equivalents	16,103	(2,001)
Cash and cash equivalents, beginning of year	79,721	66,190
Cash and cash equivalents, end of period	95,824	64,189
Non-cash transactions:
Loans transferred to other real estate and repossessed assets	2,850	7,558
Common stock matching contribution to Employee Stock Ownership and Profit Sharing Plan	$ 800	$ 500