Long-term Debt Textuals (Details) (USD $)	9 Months Ended			1 Months Ended	9 Months Ended			3 Months Ended	9 Months Ended				1 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 7.875% Senior Notes due November 2026	Jun. 30, 2014 Junior Subordinated Debt [Member]	Sep. 30, 2014 Junior Subordinated Debt [Member]	Sep. 24, 2013 Revolving Credit Facility [Member]	Sep. 24, 2013 2013 Term Loan Facility due September 2020	Sep. 30, 2013 Term Loan & 2011 Term Loan [Member]	Sep. 30, 2013 Term Loan & 2011 Term Loan [Member]	Sep. 30, 2013 Australian Bonds [Member]	Sep. 30, 2014 Voluntary Loan Repayments [Member]	Sep. 30, 2013 Voluntary Loan Repayments [Member]	Jun. 30, 2014 Amount Per Principal Amount [Member] Junior Subordinated Debt [Member]	Jun. 30, 2014 Principal Amount [Member] Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Stated interest rate - percentage			7.875%
Payments of consent fees	$ 10,100,000	$ 22,800,000		$ 10,100,000									$ 15	$ 1,000
Third party fees classified in interest expense					1,600,000
Credit agreement borrowing capacity						1,650,000,000	1,200,000,000
Loss on debt extinguishment								11,500,000	11,500,000			5,400,000
Repayments of long-term debt	$ 15,600,000	$ 1,384,000,000							$ 167,000,000	$ 32,400,000	$ 0