Restructuring (Activity in Restructuring Accruals) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Restructuring Reserve [Roll Forward]
Balance at January 1, 2015	$ 2,780
Employee severance and related costs	33,951	[1]	9,650	[1]
Payments	(21,381)
Balance at March 31, 2015	14,496
Employee Severance and Related Costs [Member]
Restructuring Reserve [Roll Forward]
Employee severance and related costs	31,150
Consolidation of Leased Facilities [Member]
Restructuring Reserve [Roll Forward]
Employee severance and related costs	1,947
2014 Restructuring Program [Member]
Restructuring Reserve [Roll Forward]
Balance at January 1, 2015	2,780
Payments	(2,430)
Balance at March 31, 2015	1,234
2014 Restructuring Program [Member] | Employee Severance and Related Costs [Member]
Restructuring Reserve [Roll Forward]
Employee severance and related costs	884
2014 Restructuring Program [Member] | Consolidation of Leased Facilities [Member]
Restructuring Reserve [Roll Forward]
Employee severance and related costs	0
2015 Restructuring Program [Member]
Restructuring Reserve [Roll Forward]
Balance at January 1, 2015	0
Payments	(18,951)
Balance at March 31, 2015	13,262
2015 Restructuring Program [Member] | Employee Severance and Related Costs [Member]
Restructuring Reserve [Roll Forward]
Employee severance and related costs	30,266
2015 Restructuring Program [Member] | Consolidation of Leased Facilities [Member]
Restructuring Reserve [Roll Forward]
Employee severance and related costs	$ 1,947

[1] Represents expenses presented to management on a consolidated basis only and not allocated to the operating segments.