CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash Flows From Operating Activities:
Net income	$ 11,846	$ 12,105
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	4,051	3,275
Net gains on sales of securities		(3,137)
Stock-based compensation expense	1,031	918
Provision for loan losses		500
Increase in income tax liability	923	1,109
Increase in pension liability	356	1,253
Other operating activities, net	395	(1,459)
Net cash provided by operating activities	18,602	14,564
Cash Flows From Investing Activities:
Proceeds from sales of securities available-for-sale		63,660
Proceeds from maturities of securities available-for-sale	8,290	6,803
Purchase of securities available-for-sale	(13,362)	(16,030)
Net (increase) decrease in loans	(13,352)	16,406
Increase in payments in excess of funding	(46,627)	(10,451)
Purchases of premises and equipment, net	(2,948)	(2,284)
Net cash (used in) provided by investing activities	(67,999)	58,104
Cash Flows From Financing Activities:
Net increase (decrease) in noninterest-bearing demand deposits	3,823	(8,237)
Net decrease in interest-bearing demand and savings deposits	(21,153)	(9,519)
Net decrease in time deposits	(13,655)	(4,943)
Net increase in accounts and drafts payable	41,905	83,309
Cash dividends paid	(4,612)	(4,135)
Distribution of stock awards, net	(450)	(378)
Net cash provided by financing activities	5,858	56,097
Net (decrease) increase in cash and cash equivalents	(43,539)	128,765
Cash and cash equivalents at beginning of period	225,262	141,088
Cash and cash equivalents at end of period	181,723	269,853
Supplemental information:
Cash paid for interest	1,103	1,398
Cash paid for income taxes	$ 2,737	$ 2,991