Fair Value Disclosures - Assets, Liabilities and Off-Balance Sheet Items Not Measured at Fair Value (Details 4) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Deposits:
Time deposits	$ 356,877	$ 408,500	[1]
Carrying Amount [Member]
Assets:
Cash and short-term interest-earning assets	105,944	107,377
Held-to-maturity securities	45,538	45,804
Loans held for sale	1,333	3,157
Net loans and leases	1,434,947	1,416,536
Total assets	1,587,762	1,572,874
Deposits:
Demand and savings deposits, non-maturity	1,387,045	1,340,732
Time deposits	356,877	408,500
Total deposits	1,743,922	1,749,232
Short-term borrowings	100,134	109,740
Long-term borrowings	21,744	27,494
Total Liabilities	1,865,800	1,886,466
Fair Value [Member]
Assets:
Cash and short-term interest-earning assets	105,944	107,377
Held-to-maturity securities	46,296	45,639
Loans held for sale	1,385	3,255
Net loans and leases	1,461,692	1,453,129
Total assets	1,615,317	1,609,400
Deposits:
Demand and savings deposits, non-maturity	1,387,045	1,340,732
Time deposits	359,919	411,818
Total deposits	1,746,964	1,752,550
Short-term borrowings	97,910	106,677
Long-term borrowings	21,714	27,654
Total Liabilities	1,866,588	1,886,881
Off-Balance-Sheet:
Commitments to extend credit	(1,240)	(1,227)
Fair Value [Member] | Level 1 [Member]
Assets:
Cash and short-term interest-earning assets	105,944	107,377
Total assets	105,944	107,377
Deposits:
Demand and savings deposits, non-maturity	1,387,045	1,340,732
Total deposits	1,387,045	1,340,732
Total Liabilities	1,387,045	1,340,732
Fair Value [Member] | Level 2 [Member]
Assets:
Held-to-maturity securities	46,296	45,639
Loans held for sale	1,385	3,255
Total assets	47,681	48,894
Deposits:
Time deposits	359,919	411,818
Total deposits	359,919	411,818
Short-term borrowings	97,910	106,677
Long-term borrowings	21,714	27,654
Total Liabilities	479,543	546,149
Off-Balance-Sheet:
Commitments to extend credit	(1,240)	(1,227)
Fair Value [Member] | Level 3 [Member]
Assets:
Net loans and leases	1,461,692	1,453,129
Total assets	1,461,692	1,453,129
Deposits:
Demand and savings deposits, non-maturity
Time deposits
Total deposits
Short-term borrowings
Long-term borrowings
Total Liabilities
Off-Balance-Sheet:
Commitments to extend credit

[1] Note: The consolidated balance sheet at December 31, 2011 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by U. S. generally accepted accounting principles for complete financial statements. Certain amounts have been reclassified to conform to the current-year presentation. See accompanying notes to the unaudited consolidated financial statements.