Restructuring and Other Related Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Restructuring Reserve [Roll Forward]
Charges	$ 0	$ 49
Employee severance and related costs
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning	1,147	2,202
Cash payments	609	509
Charges	0	12
Restructuring Reserve, Ending	538	1,705
Real estate exit and related costs
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning	3,314	2,935
Cash payments	676	609
Charges	0	37
Restructuring Reserve, Ending	2,638	2,363
Accrued restructuring liability
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning	4,461	5,137
Cash payments	1,285	1,118
Charges	0	49
Restructuring Reserve, Ending	3,176	$ 4,068
Accrued restructuring liability | Other Current Liabilities [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning	3,500
Restructuring Reserve, Ending	2,300
Accrued restructuring liability | Other Noncurrent Liabilities [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Beginning	1,000
Restructuring Reserve, Ending	$ 900