Consolidated Statements of Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Held-to-maturity Securities, Fair Value	$ 72,403	$ 74,922
Perferred Stock, Liquidation Value Per Share	$ 1,000	$ 1,000
Preferred Stock, Shares Authorized	5,000,000	5,000,000
Common Stock, No Par Value
Common Stock, Shares Authorized	25,000,000	25,000,000
Common Stock, Shares, Issued	18,477,412	18,477,412
Common Stock, Shares, Outstanding	16,332,327	16,332,327
Treasury Stock, Shares	2,145,085	2,145,085
Series A Preferred Stock [Member]
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Series B Preferred Stock [Member]
Preferred Stock, Shares Issued	11,250	11,250
Preferred Stock, Shares Outstanding	11,250	11,250