Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2011

Shareholders' Equity [Abstract]

Issued Share Capital

	2011		2010
Common shares issued and fully paid, 2011: CHF 14.03 per share and 2010: CHF 15.00 per share		40,003,642		40,003,642
Share capital at end of year		557,153		600,055

Schedule Of Common Stock Outstanding Roll Forward

	Year Ended December 31, 2011
Total shares issued at beginning and end of period		40,003,642
Treasury shares issued, balance at beginning of period		1,914,416
Shares repurchased		1,419,163
Shares issued out of treasury		(1,072,068	)
Total treasury shares at end of period		2,261,511
Total shares outstanding at end of period		37,742,131