CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating activities:
Net income	$ 43,069	$ 43,073
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan and lease losses	2,160	4,553
Depreciation of premises and equipment	3,517	3,502
Depreciation of equipment owned and leased to others	13,342	10,110
Stock-based compensation	2,953	2,640
Amortization of investment security premiums and accretion of discounts, net	3,433	3,411
Amortization of mortgage servicing rights	1,117	930
Deferred income taxes	(3,914)	(1,629)
Gains on investment securities available-for-sale	(4)	(963)
Originations of loans held for sale, net of principal collected	(90,381)	(91,936)
Proceeds from the sales of loans held for sale	97,402	87,518
Net gain on sale of loans held for sale	(2,604)	(2,573)
Net gain on sale of other real estate and repossessions	(818)	(1,510)
Change in trading account securities	205	(4)
Change in interest receivable	(666)	(945)
Change in interest payable	312	(955)
Change in other assets	(4,802)	(3,008)
Change in other liabilities	5,068	(1,218)
Other	1,200	2,288
Net change in operating activities	70,589	53,284
Investing activities:
Proceeds from sales of investment securities	1,299	1,236
Proceeds from maturities of investment securities	78,033	138,316
Purchases of investment securities	(75,757)	(119,700)
Net change in other investments	(927)	(617)
Loans sold or participated to others	1,962	15,363
Net change in loans and leases	(276,108)	(127,646)
Net change in equipment owned under operating leases	(34,984)	(15,156)
Purchases of premises and equipment	(4,612)	(4,254)
Proceeds from sales of other real estate and repossessions	6,788	9,522
Net change in investing activities	(304,306)	(102,936)
Financing activities:
Net change in demand deposits and savings accounts	140,737	52,369
Net change in time deposits	75,559	129,953
Net change in short-term borrowings	37,688	(97,409)
Proceeds from issuance of long-term debt	0	7,185
Payments on long-term debt	(924)	(11,433)
Net proceeds from issuance of treasury stock	149	197
Acquisition of treasury stock	(8,208)	(16,342)
Cash dividends paid on common stock	(13,285)	(13,209)
Net change in financing activities	231,716	51,311
Net change in cash and cash equivalents	(2,001)	1,659
Cash and cash equivalents, beginning of year	66,190	80,052
Cash and cash equivalents, end of period	64,189	81,711
Non-cash transactions:
Loans transferred to other real estate and repossessed assets	7,558	6,528
Common stock matching contribution to Employee Stock Ownership and Profit Sharing Plan	$ 500	$ 0