Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating Activities
Net income	$ 13,803	$ 7,987
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization and accretion	(1,634)	(1,130)
Provision for loan losses	1,363	1,738
Depreciation of premises and equipment	1,478	1,399
Deferred income tax expense	752	(1,151)
Net periodic employee benefit cost	179	329
Realized investment securities gains	(83)	(84)
Stock-compensation expense	572	457
Increase in value of bank-owned life insurance	(756)	(812)
Loans originated for sale	(940)	(11,554)
Proceeds from the sale of loans originated for sale	1,672	14,630
Gain on sale of loans	(49)	(298)
Change in accrued interest receivable	(977)	(615)
Change in other assets	(3,629)	4,417
Change in other liabilities	(5,240)	(620)
Net Cash Provided by Operating Activities	6,511	14,693
Investing Activities
Proceeds from sales of securities available-for-sale	129	488
Proceeds from maturities and calls of securities available-for-sale	13,885	46,205
Proceeds from maturities and calls of securities held-to-maturity	0	5,083
Purchases of securities available-for-sale	(10,262)	(488)
Payments to Acquire Held-to-maturity Securities	(10,226)	0
Net decrease in loans	49,511	16,391
Purchases of premises and equipment	(356)	(1,700)
Acquisitions, net of cash acquired	0	(21,849)
Net Cash Provided by Investing Activities	42,681	44,130
Financing Activities
Net increase in noninterest-bearing deposits	17,178	53,065
Net increase in interest-bearing deposits	27,430	39,138
Net (decrease) increase in short-term borrowings	(15,885)	1,781
Purchases of treasury stock	(2,936)	0
Proceeds from exercise of stock options	199	1,397
Dividends paid	(5,827)	(5,461)
Net Cash Provided by Financing Activities	20,159	89,920
Increase in Cash and Cash Equivalents	69,351	148,743
Cash and cash equivalents at beginning of period	85,876	84,994
Cash and Cash Equivalents at End of Period	$ 155,227	$ 233,737