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Shareholders' Equity (Schedule of Weighted Average Assumptions for Stock Options Granted) (Details) (USD $)	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Shareholders' Equity
Dividend yield	2.79%	2.73%
Expected life (years)	7.1	7.1
Expected volatility	52.00%	52.00%
Risk-free rate	2.71%	3.04%
Weighted average fair value of options on date of grant	$ 4.65	$ 5.18

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

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