Annual report pursuant to Section 13 and 15(d)

Amortized Cost And Fair Value Of Available For Sale And Held To Maturity Securities (Detail)

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Amortized Cost And Fair Value Of Available For Sale And Held To Maturity Securities (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Securities available for sale    
Amortized Cost $ 222,654 $ 282,648
Gross Unrealized Gain 11,345 11,255
Gross Unrealized Loss (122) (94)
Market Value 233,877 293,809
Securities held to maturity    
Amortized Cost 25,967 15,209
Gross Unrealized Gain 1,423 790
Gross Unrealized Loss (40) 0
Market Value 27,350 15,999
Us Treasury and Government [Member]
   
Securities available for sale    
Amortized Cost 27,360 98,169
Gross Unrealized Gain 1,026 1,512
Gross Unrealized Loss 0 (59)
Market Value 28,386 99,622
Collateralized Mortgage Backed Securities [Member]
   
Securities available for sale    
Amortized Cost 69,298 88,118
Gross Unrealized Gain 4,168 4,462
Gross Unrealized Loss 0 0
Market Value 73,466 92,580
Securities held to maturity    
Amortized Cost 20,429 9,676
Gross Unrealized Gain 768 410
Gross Unrealized Loss (40) 0
Market Value 21,157 10,086
Us States and Political Subdivisions Debt Securities [Member]
   
Securities available for sale    
Amortized Cost 112,319 95,331
Gross Unrealized Gain 5,941 5,230
Gross Unrealized Loss (83) (35)
Market Value 118,177 100,526
Securities held to maturity    
Amortized Cost 5,538 5,533
Gross Unrealized Gain 655 380
Gross Unrealized Loss 0 0
Market Value 6,193 5,913
Corporate Debt Securities [Member]
   
Securities available for sale    
Amortized Cost 13,677 1,030
Gross Unrealized Gain 210 51
Gross Unrealized Loss (39) 0
Market Value $ 13,848 $ 1,081