Significant Accounting Policies Other Charges (Credits) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Long-term Debt, Gross	$ 2,331,410		$ 2,331,410		$ 2,346,488
Separation, Benefit Plan Termination and Related Costs	2,597	$ 3,004	3,168	$ 13,280
Acquisition Costs, Period Cost	3,522	0	4,000	0
Merger related costs	5,286	0	5,286	0
Debt Related Costs	0	7,760	0	7,760
charges relating to business disposition	0	520	0	520
Other charges	$ 11,405	$ 11,284	$ 12,454	$ 21,560