General Information (Details Textuals) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 countries	Dec. 31, 2013	Dec. 31, 2012
General Information [Abstract]
Number of countries in which The Company underwrites non-correlated specialty insurance products	180
Amount of internal claims department cost reclassified from other operating expense to loss and loss adjustment expense, net		$ 32.4	$ 32.6
Premiums Receivable, Allowance for Doubtful Accounts	5.1	5.8
ForeignCurrencyTransactionGainLossBeforeTax	$ 23.2	$ (5.3)	$ (6.2)