Restructuring and Related Charges (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($)
2015 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Accrued restructuring and related charges liability as of period start	$ 4,305
Restructuring charges	0
Payments	(1,068)
Accrued restructuring and related charges liability as of period end	3,237
Restructuring Cost [Abstract]
Restructuring charges incurred	24,000
2015 Restructuring Plan [Member] | Severance and Other Employee-Related Costs [Member]
Restructuring Reserve [Roll Forward]
Accrued restructuring and related charges liability as of period start	4,242
Restructuring charges	0
Payments	(1,062)
Accrued restructuring and related charges liability as of period end	3,180
2015 Restructuring Plan [Member] | Consulting and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Accrued restructuring and related charges liability as of period start	63
Restructuring charges	0
Payments	(6)
Accrued restructuring and related charges liability as of period end	57
2016 Restructuring Plan [Member]
Restructuring Reserve [Roll Forward]
Accrued restructuring and related charges liability as of period start	3,899
Restructuring charges	810
Payments	(2,886)
Adjustments	(125)	[1]
Accrued restructuring and related charges liability as of period end	1,698
Restructuring Cost [Abstract]
Restructuring charges incurred	5,600
2016 Restructuring Plan [Member] | Severance and Other Employee-Related Costs [Member]
Restructuring Reserve [Roll Forward]
Accrued restructuring and related charges liability as of period start	3,851
Restructuring charges	794
Payments	(2,822)
Adjustments	(125)	[1]
Accrued restructuring and related charges liability as of period end	1,698
2016 Restructuring Plan [Member] | Consulting and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Accrued restructuring and related charges liability as of period start	48	[2]
Restructuring charges	16	[2]
Payments	(64)	[2]
Adjustments	0	[1],[2]
Accrued restructuring and related charges liability as of period end	$ 0	[2]

[1] Adjustments consist primarily of actual employee tax and benefit amounts differing from previous estimates.

[2] Consulting and other costs consist of third-party consulting charges incurred in connection with the 2016 Restructuring Plan.