Shareholders' Equity (Narrative) (Details) (CHF) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Class of Stock [Line Items]
Shares cancelled, shares	940,445
Maximum authorized value increase of registered share capital	92,259
Voting Common Stock [Member]
Class of Stock [Line Items]
Shares cancelled, shares	940,445
Maximum authorized increased voting shares	7,500,728