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Bank Premises And Equipment And Leases (Bank Premises And Equipment) (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Bank premises and equipment, Gross $ 171,912 $ 174,981
Less allowance for depreciation and amortization 99,742 98,539
Bank premises and equipment, Net 72,170 76,442
Land [Member]
   
Bank premises and equipment, Gross 23,166 24,084
Buildings And Improvements [Member]
   
Bank premises and equipment, Gross 80,997 79,723
Leasehold Improvements [Member]
   
Bank premises and equipment, Gross 20,906 22,579
Furniture Fixtures And Equipment [Member]
   
Bank premises and equipment, Gross $ 46,843 $ 48,595