Equity Incentive Plans (Information About The Company's Restricted Stock Awards) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Equity Incentive Plans [Abstract]
Shares of Restricted Stock non-vested at beginning of year	111,600	74,450
Shares of Restricted Stock, Granted	170,730	99,409
Shares of Restricted Stock, Cancelled/forfeited
Shares of Restricted Stock, Vested	(28,894)	(62,259)
Shares of Restricted Stock non-vested at end of year	253,436	111,600
Shares non-vested at beginning of year, Weighted Average Price on Grant Date	$ 27.89	$ 21.39
Weighted Average Price on Grant Date, Granted	$ 26.72	$ 28.21
Weighted Average Price on Grant Date, Cancelled/forfeited	$ 0.00	$ 0.00
Weighted Average Price on Grant Date, Vested	$ 28.71	$ 20.62
Shares non-vested end of year, Weighted Average Price on Grant Date	$ 27.01	$ 27.89