Loans and the Allowance for Credit Losses (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Schedule of recorded Investment in loans by category
Total portfolio loans	$ 3,275,830	$ 3,239,368
Loans held for sale	7,305	6,084
Total loans	3,283,135	3,245,452
Commercial Real Estate Land and Construction [Member]
Schedule of recorded Investment in loans by category
Total portfolio loans	158,413	175,867
Commercial Real Estate Improved Property [Member]
Schedule of recorded Investment in loans by category
Total portfolio loans	1,536,632	1,509,698
Commercial Real Estate [Member]
Schedule of recorded Investment in loans by category
Total portfolio loans	1,695,045	1,685,565
Commercial and Industrial [Member]
Schedule of recorded Investment in loans by category
Total portfolio loans	420,689	426,315
Residential Real Estate [Member]
Schedule of recorded Investment in loans by category
Total portfolio loans	662,556	621,383
Home Equity [Member]
Schedule of recorded Investment in loans by category
Total portfolio loans	250,988	251,785
Consumer [Member]
Schedule of recorded Investment in loans by category
Total portfolio loans	$ 246,552	$ 254,320

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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The aggregate carrying amount of loans receivable that will be sold to other entities. Includes mortgage and all other loans (collectively, loans) not classified as held for investment. Such loans are stated at the lower of cost or market, or elected fair value. Mortgage loans exclude mortgage-backed securities which are considered a debt security (other loan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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+ Details