CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash Flows From Operating Activities:
Net income	$ 11,870	$ 11,458
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,112	2,228
Gains on sales of securities	(2,134)	(48)
Provision for loan losses	800	1,300
Stock-based compensation expense	702	700
Increase (decrease) in income tax liability	890	(235)
Increase in pension liability	203	231
Other operating activities, net	1,263	(996)
Net cash provided by operating activities	16,706	14,638
Cash Flows From Investing Activities:
Proceeds from sales of securities available-for-sale	29,749	5,405
Proceeds from maturities of securities available-for-sale	5,940	7,680
Purchase of securities available-for-sale	(49,042)	(12,342)
Net increase in loans	(22,978)	(10,116)
Increase in payments in excess of funding	(7,763)	(23,394)
Purchases of premises and equipment, net	(768)	(1,143)
Acquisition of waste expense management service company's assets	(7,798)	0
Net cash used in investing activities	(52,660)	(33,910)
Cash Flows From Financing Activities:
Net increase in noninterest-bearing demand deposits	605	21,036
Net decrease in interest-bearing demand and savings deposits	(27,722)	(5,972)
Net decrease in time deposits	(10,188)	(11,942)
Net (decrease) increase in accounts and drafts payable	(2,382)	84,499
Cash dividends paid	(3,531)	(3,011)
Distribution of stock awards, net	(128)	(249)
Other financing activities, net	0	114
Net cash (used in) provided by financing activities	(43,346)	84,475
Net (decrease) increase in cash and cash equivalents	(79,300)	65,203
Cash and cash equivalents at beginning of period	235,962	138,929
Cash and cash equivalents at end of period	156,662	204,132
Supplemental information:
Cash paid for interest	1,624	2,342
Cash paid for income taxes	$ 3,373	$ 4,135