CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash Flows From Operating Activities:
Net income	$ 8,092	$ 6,307
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,018	2,704
Net gains on sales of securities	(13)
Stock-based compensation expense	638	537
Provision for loan losses
Increase in income tax liability	1,352	467
Increase in pension liability	1,231	1,155
Decrease in accounts receivable	6,410	1,655
Other operating activities, net	(2,569)	(7,204)
Net cash provided by operating activities	18,159	5,621
Cash Flows From Investing Activities:
Proceeds from sales of securities available-for-sale	9,543
Proceeds from maturities of securities available-for-sale	11,030	17,623
Purchase of securities available-for-sale	(16,752)	(52,599)
Net increase in loans	(15,764)	(10,498)
Increase in payments in excess of funding	(18,454)	(16,428)
Purchases of premises and equipment, net	(1,387)	(887)
Net cash used in investing activities	(31,784)	(62,789)
Cash Flows From Financing Activities:
Net decrease in noninterest-bearing demand deposits	(23,626)	(18,796)
Net decrease in interest-bearing demand and savings deposits	(15,149)	(24,994)
Net (decrease) increase in time deposits	(69)	185
Net increase (decrease) in accounts and drafts payable	27,825	(19,064)
Cash dividends paid	(2,948)	(2,575)
Purchase of common shares for treasury	(1,030)
Other financing activities, net	94	(761)
Net cash used in financing activities	(14,903)	(66,005)
Net decrease in cash and cash equivalents	(28,528)	(123,173)
Cash and cash equivalents at beginning of period	228,110	266,743
Cash and cash equivalents at end of period	199,582	143,570
Supplemental information:
Cash paid for interest	667	476
Cash paid for income taxes	$ 263	$ 1,198