Restructuring Charges and Asset Impairments (Restructuring Charges) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Restructuring Costs
Balance Beginning	$ 28,657	$ 47,422
Expenses, net	25,419	22,721
Cash payments	(19,016)	(33,866)
Balance Ending	$ 35,060	36,277
Restructuring reserve, expected international payment period, extend beyond	24 months
Minimum
Restructuring Costs
Restructuring reserve, expected payment period	12 months
Maximum
Restructuring Costs
Restructuring reserve, expected payment period	24 months
Severance and benefits costs
Restructuring Costs
Balance Beginning	$ 28,376	43,700
Expenses, net	23,859	21,399
Cash payments	(18,519)	(30,969)
Balance Ending	33,716	34,130
Other exit costs
Restructuring Costs
Balance Beginning	281	3,722
Expenses, net	1,560	1,322
Cash payments	(497)	(2,897)
Balance Ending	$ 1,344	$ 2,147