Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Activities
Net income	$ 7,987	$ 10,031
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization and accretion	(1,130)	682
Provision for loan losses	1,738	1,950
Depreciation of premises and equipment	1,399	1,086
Deferred income tax (benefit) expense	(1,151)	211
Net periodic employee benefit cost	329	131
Realized investment securities (gains) losses	(84)	31
Stock-compensation expense	457	442
Increase in value of bank-owned life insurance	(812)	(692)
Loans originated for sale	(11,554)	(7,664)
Proceeds from the sale of loans originated for sale	14,630	7,989
Change in accrued interest receivable	(615)	364
Change in other assets	4,119	1,056
Change in other liabilities	(620)	(3,848)
Net Cash Provided by Operating Activities	14,693	11,769
Investing Activities
Proceeds from sales of securities available-for-sale	488	5,336
Proceeds from maturities and calls of securities available-for-sale	46,205	24,822
Proceeds from maturities and calls of securities held-to-maturity	5,083
Purchases of securities available-for-sale	(488)	(32,492)
Net decrease (increase) in loans	16,391	(2,033)
Purchases of premises and equipment	(1,700)	(1,971)
Acquisition of Community Bank, net of cash acquired	(21,849)
Net Cash Provided by (Used in) Investing Activities	44,130	(6,338)
Financing Activities
Net increase in noninterest-bearing deposits	53,065	34,267
Net increase in interest-bearing deposits	39,138	44,643
Net increase (decrease) in short-term borrowings	1,781	(75,226)
Purchases of treasury stock		(3,072)
Proceeds from exercise of stock options	1,397	488
Dividends paid	(5,461)	(5,171)
Net Cash Provided by (Used in) Financing Activities	89,920	(4,071)
Increase in Cash and Cash Equivalents	148,743	1,360
Cash and cash equivalents at beginning of period	84,994	146,399
Cash and Cash Equivalents at End of Period	$ 233,737	$ 147,759