Consolidated Statements Of Cash Flows (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income $ 15,131 $ 15,194 $ 14,620
Adjustments to reconcile net income to net cash provided by operating activities:      
Provision for loan losses 800 950 750
Deferred tax expense (benefit) 4,329 772 (1,337)
Depreciation and amortization 2,181 1,948 1,891
Amortization of investment security premiums and accretion of discounts, net 1,101 2,330 3,858
Stock based compensation 187 172 164
Contribution to pension plan 0 (5,000) 0
Net (losses) gains on sales of investment securities 12 (507) (1,049)
Other-than-temporary impairment losses on investment securities 166 0 55
Net gains on sale of loans 0 0 (25)
Net gains on sale of premises, equipment and other assets (794) (1,040) 119
Deferred (gain) on sale of premises (934) 0 0
Gains on sale of other real estate owned (20) (7) (50)
Equity in losses of real estate limited partnerships, net 1,039 1,516 1,766
Changes in assets and liabilities:      
Net change in interest receivable 386 753 (129)
Net change in other assets (1,635) (2,333) 2,130
Net change in interest payable (19) 2,196 (96)
Net change in other liabilities 634 (11,282) 8,726
Net cash provided by operating activities 22,564 5,662 31,393
CASH FLOWS FROM INVESTING ACTIVITIES:      
Proceeds from sales of investment securities available for sale 53,215 129,936 131,858
Proceeds from maturities of investment securities available for sale 99,979 186,540 181,385
Proceeds from maturities of investment securities held to maturity 7,254 151 236
Proceeds from redemption of Federal Home Loan Bank stock 649 485 0
Purchases of investment securities available for sale (60,580) (316,251) (358,906)
Loan originations in excess of principal payments (86,185) (55,428) (117,536)
Proceeds from sales of loans, net 2,378 0 80
Proceeds from sale of other assets 0 334 0
Proceeds from sale of premises and equipment 3,026 788 52
Proceeds from sales of other real estate owned 171 505 380
Real estate limited partnership investments (247) (1,750) (1,702)
Investment in bank owned life insurance (10,000) 0 0
Purchases of bank premises and equipment (3,019) (3,877) (1,929)
Net cash provided by (used in) investing activities 6,641 (58,567) (166,082)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Net increase in deposits 52,496 93,200 85,684
Net increase in short-term borrowings 0 0 (2,964)
Net increase in securities sold under agreement to repurchase, short-term (37,206) 24,993 37,834
Net decrease in securities sold under agreement to repurchase, long-term 0 0 (7,500)
Principal payments on long-term debt (80) (20,079) (8,577)
Cash dividends paid (6,432) (6,324) (6,233)
Sale of treasury stock 15 18 14
Increase in deferred compensation arrangements 237 213 216
Proceeds from exercise of stock options, net of withholding taxes 0 280 0
Tax benefit from exercises of stock options 8 20 1
Net cash provided by financing activities 9,038 92,321 98,475
Increase (decrease) in cash and cash equivalents 38,243 39,416 (36,214)
Cash and cash equivalents beginning of period 77,228 37,812 74,026
Cash and cash equivalents end of period 115,471 77,228 37,812
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:      
Total interest payments 5,051 4,687 8,739
Total income tax payments 800 5,950 1,950
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES      
Distribution of stock under deferred compensation arrangements 450 391 432
Distribution of treasury stock in lieu of cash dividend under dividend reinvestment plan 622 683 719
Non-cash exercise of stock options 181 130 124
Transfer of loans to other real estate owned 213 140 497
Transfer of securities from available for sale to held to maturity 152,887 0 0
Decrease in payable for investments purchased $ 0 $ (9,461) $ 9,461