Commitments and Contingencies Contractual Obligations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Commitments [Line Items]
Provision For Employee Separation Expenses	$ 162	$ 136	$ 1,355	$ 136
Construction in Progress [Member]
Other Commitments [Line Items]
Unaccrued Contractual And Other Commitments	$ 56,500		$ 56,500