Restructuring and Related Charges Restructuring Costs (Details) - 2015 Restructuring Plan [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Restructuring Cost and Reserve [Line Items]
Employee termination costs	$ 26	$ 560	$ (644)	$ 5,147
Relocation and other employee-related costs	283	1,885	539	3,381
Accelerated depreciation and amortization charges	0	10,853	0	20,132
Total restructuring charges	$ 309	$ 13,298	$ (105)	$ 28,660