Restructuring Charges (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Restructuring Charges
Restructuring Charges	$ 0	$ 11,600,000
Asset Impairment Charges		4,000,000
Employee Severance
Restructuring Charges
Balance as of December 31, 2016	42
Expensed	0
Cash Payments	42
Balance as of March 31, 2017	0	42
Contract Termination
Restructuring Charges
Balance as of December 31, 2016	0
Expensed	0
Cash Payments	0
Balance as of March 31, 2017	0	0
Restructuring Charges
Restructuring Charges
Balance as of December 31, 2016	42
Expensed	0
Cash Payments	42
Balance as of March 31, 2017	$ 0	$ 42