Restructuring - (Activity in Restructuring Accruals) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Reserve [Roll Forward]
Balance, beginning		$ 2,780
Employee severance and consolidation of leased facility costs	[1]	100,411	$ 20,424	$ 0
Payments		(60,827)
Reversal of previous charges		(286)
Balance, ending		40,396	2,780
2014 Restructuring Program [Member]
Restructuring Reserve [Roll Forward]
Balance, beginning		2,780
Payments		(3,433)
Reversal of previous charges		(286)
Balance, ending		1,121	2,780
2015 Restructuring Program [Member]
Restructuring Reserve [Roll Forward]
Balance, beginning		0
Employee severance and consolidation of leased facility costs		68,900
Payments		(44,243)
Reversal of previous charges		0
Balance, ending		22,694	0
2015 Other Restructuring Program [Member]
Restructuring Reserve [Roll Forward]
Balance, beginning		0
Employee severance and consolidation of leased facility costs		29,732
Payments		(13,151)
Reversal of previous charges		0
Balance, ending		16,581	$ 0
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Employee severance and consolidation of leased facility costs		76,629
Balance, ending		40,400
Employee Severance [Member] | 2014 Restructuring Program [Member]
Restructuring Reserve [Roll Forward]
Employee severance and consolidation of leased facility costs		2,060
Employee Severance [Member] | 2015 Restructuring Program [Member]
Restructuring Reserve [Roll Forward]
Employee severance and consolidation of leased facility costs		44,837
Employee Severance [Member] | 2015 Other Restructuring Program [Member]
Restructuring Reserve [Roll Forward]
Employee severance and consolidation of leased facility costs		29,732
Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Employee severance and consolidation of leased facility costs		22,100
Facility Closing [Member] | 2014 Restructuring Program [Member]
Restructuring Reserve [Roll Forward]
Employee severance and consolidation of leased facility costs		0
Facility Closing [Member] | 2015 Restructuring Program [Member]
Restructuring Reserve [Roll Forward]
Employee severance and consolidation of leased facility costs		22,100
Facility Closing [Member] | 2015 Other Restructuring Program [Member]
Restructuring Reserve [Roll Forward]
Employee severance and consolidation of leased facility costs		$ 0

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