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Earnings Per Share Treasury Share Buyback (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share [Abstract]
Shares which exclude consideration of stock options in calculation of diluted shares outstanding	1,866,720	865,844	226,897
Treasury stock, shares		10,000,000
Treasury stock, value	$ 0	$ (101,697)
Weighted average number diluted shares outstanding adjustment	5,600,000

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