Other Other	9 Months Ended
Sep. 30, 2013
Other [Abstract]
Other Item Disclosure [Text Block]	Debt At September 30, 2013, short-term debt consisted entirely of securities lending agreements. During the nine months ended September 30, 2013, we made principal payments of $45.0 million on our senior secured non-recourse notes issued by Northwind Holdings, LLC. In January 2013, we purchased and retired the outstanding principal of $62.5 million on our senior secured non-recourse notes issued by Tailwind Holdings, LLC, resulting in a before-tax gain of $4.0 million. In August 2013, we entered into a five-year, $400.0 million unsecured revolving credit facility. Borrowings under the facility are for general corporate uses and are subject to financial covenants, negative covenants, and events of default that are customary. The facility provides for interest rates based on either the prime rate or LIBOR. At September 30, 2013, no amount was outstanding on the facility. Income Tax At September 30, 2013, we had a liability of $21.5 million for unrecognized tax benefits, $15.0 million of which is associated with deferred tax assets. The interest and penalties expense (benefit) related to unrecognized tax benefits in our consolidated statements of income was $0.1 million and $0.3 million for the three and nine months ended September 30, 2013, respectively, and less than $0.1 million and $(10.5) million for the three and nine months ended September 30, 2012, respectively. During the third quarter of 2013, an income tax rate reduction was enacted which reduced the tax rate in the U.K. from the current rate of 23 percent to 21 percent effective April 2014 and to 20 percent effective April 2015. During the third quarter of 2012, an income tax rate reduction was enacted which reduced the tax rate in the U.K. from 25 percent to 24 percent effective April 2012 and to 23 percent effective April 2013. Deferred tax assets and liabilities are adjusted through income on the date of enactment of a rate change. We recorded a reduction of $6.3 million and $9.3 million in our income tax expense in the third quarter of 2013 and 2012, respectively.

Debt

At September 30, 2013, short-term debt consisted entirely of securities lending agreements.

During the nine months ended September 30, 2013, we made principal payments of $45.0 million on our senior secured non-recourse notes issued by Northwind Holdings, LLC.

In January 2013, we purchased and retired the outstanding principal of $62.5 million on our senior secured non-recourse notes issued by Tailwind Holdings, LLC, resulting in a before-tax gain of $4.0 million.

In August 2013, we entered into a five-year, $400.0 million unsecured revolving credit facility. Borrowings under the facility are for general corporate uses and are subject to financial covenants, negative covenants, and events of default that are customary. The facility provides for interest rates based on either the prime rate or LIBOR. At September 30, 2013, no amount was outstanding on the facility.

Income Tax

At September 30, 2013, we had a liability of $21.5 million for unrecognized tax benefits, $15.0 million of which is associated with deferred tax assets. The interest and penalties expense (benefit) related to unrecognized tax benefits in our consolidated statements of income was $0.1 million and $0.3 million for the three and nine months ended September 30, 2013, respectively, and less than $0.1 million and $(10.5) million for the three and nine months ended September 30, 2012, respectively.

During the third quarter of 2013, an income tax rate reduction was enacted which reduced the tax rate in the U.K. from the current rate of 23 percent to 21 percent effective April 2014 and to 20 percent effective April 2015. During the third quarter of 2012, an income tax rate reduction was enacted which reduced the tax rate in the U.K. from 25 percent to 24 percent effective April 2012 and to 23 percent effective April 2013. Deferred tax assets and liabilities are adjusted through income on the date of enactment of a rate change. We recorded a reduction of $6.3 million and $9.3 million in our income tax expense in the third quarter of 2013 and 2012, respectively.