Long-term Debt TEUs (Details) (USD $)			12 Months Ended			0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 TEUs - amortizing note [Member]	Dec. 31, 2012 TEUs - amortizing note [Member]	Sep. 19, 2012 TEUs - amortizing note [Member]	Sep. 19, 2012 Tangible Equity Units [Member]
Shares issued in public offering						2,300,000
Coupon rate			5.00%	5.00%
Debt instrument, maturity date			Oct. 01, 2015
Principal amount per amortizing note					$ 14.1023
Debt and Capital Lease Obligations	$ 1,624,712,000	$ 1,858,135,000	$ 21,878,000	$ 32,435,000
Tangible Equity Units Cash Installment Per Note				$ 1.25
Tangible Equity Units Cash Installment Per Note on January 1 2013				$ 1.4167
Temporary Equity, Par or Stated Value Per Share						$ 100
Debt instrument, interest rate, stated percentage				4.50%