Interim Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data	Sep. 30, 2011	Dec. 31, 2010
Cash and cash equivalents
Amortized cost of investment securities available-for-sale	$ 404,540	$ 329,435
Deposits
Borrowed funds at fair value	$ 5,264	$ 10,423
Shareholders' equity
Common stock, no par value
Common stock, shares authorized	15,000,000	15,000,000
Common stock, shares issued	7,578,257	7,550,074
Common stock, shares to be issued	37,433	32,686
Common stock, shares outstanding	7,578,257	7,550,074