Long-Term Debt (Other Debt) (Details) (USD $) In Millions, unless otherwise specified							12 Months Ended
	Dec. 31, 2012 Mortgage Facility [Member]		Dec. 31, 2011 Mortgage Facility [Member]		Dec. 31, 2012 Capital Leases [Member]	Dec. 31, 2011 Capital Leases [Member]	Dec. 31, 2012 Secured Debt [Member] Mortgage Facility [Member] years
Debt Instrument [Line Items]
Mortgage facility	$ 203.3	[1]	$ 211.5	[1]
Debt instrument, maturity date							Nov. 30, 2017
Mortgage facility, fixed interest rate							5.864%
Number of years of mortgage loans							10
Monthly principal and interest payments on mortgage facility							1.7
Balloon payment for mortgage							155.4
Capital leases and other debt					$ 107.2	$ 30.8

[1] The mortgage facility requires monthly principal and interest payments of $1.7 million based on a fixed amortization schedule with a balloon payment of $155.4 million due November 2017.