CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating activities:
Net income	$ 32,875	$ 28,297
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan and lease losses	3,738	3,024
Depreciation of premises and equipment	2,758	2,596
Depreciation of equipment owned and leased to others	11,976	10,545
Stock-based compensation	720	1,399
Amortization of investment securities premiums and accretion of discounts, net	2,402	2,553
Amortization of mortgage servicing rights	551	716
Deferred income taxes	(1,222)	(742)
(Gains) losses on investment securities available-for-sale	(1,750)	199
Originations of loans held for sale, net of principal collected	(44,472)	(50,830)
Proceeds from the sales of loans held for sale	45,420	46,151
Net gain on sale of loans held for sale	(1,303)	(1,420)
Net loss (gain) on sale of other real estate and repossessions	75	(135)
Change in interest receivable	(224)	(173)
Change in interest payable	357	907
Change in other assets	(579)	(4,127)
Change in other liabilities	4,712	8,177
Other	1,695	(857)
Net change in operating activities	57,729	46,280
Investing activities:
Proceeds from sales of investment securities available-for-sale	1,766	3,956
Proceeds from maturities and paydowns of investment securities available-for-sale	93,098	108,215
Purchases of investment securities available-for-sale	(94,117)	(130,607)
Proceeds from liquidation of partnership investment	0	1,472
Net change in other investments	1,780	0
Loans sold or participated to others	6,579	0
Net change in loans and leases	(206,166)	(159,218)
Net change in equipment owned under operating leases	(37,692)	(19,486)
Purchases of premises and equipment	(1,017)	(3,991)
Proceeds from sales of other real estate and repossessions	2,042	714
Net change in investing activities	(237,287)	(198,945)
Financing activities:
Net change in demand deposits and savings accounts	54,453	117,906
Net change in time deposits	93,823	67,992
Net change in short-term borrowings	14,640	(27,253)
Proceeds from issuance of long-term debt	19,999	10,832
Payments on long-term debt	(25,790)	(5,703)
Stock issued under stock purchase plans	153	116
Acquisition of treasury stock	(41)	(8,005)
Cash dividends paid on common stock	(9,949)	(9,700)
Net change in financing activities	147,288	146,185
Net change in cash and cash equivalents	(32,270)	(6,480)
Cash and cash equivalents, beginning of year	108,304	79,721
Cash and cash equivalents, end of period	76,034	73,241
Non-cash transactions:
Loans transferred to other real estate and repossessed assets	5,977	1,469
Common stock matching contribution to Employee Stock Ownership and Profit Sharing Plan	$ 1,426	$ 800