Goodwill and Intangible Assets (Schedule of Goodwill) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($)
Goodwill [Roll Forward]
Balance as of December 31, 2016	$ 148,811
Impact of changes in foreign currency and other	992
Balance as of June 30, 2017	149,803
U.S. Medical
Goodwill [Roll Forward]
Balance as of December 31, 2016	130,410
Impact of changes in foreign currency and other	0
Balance as of June 30, 2017	130,410
International Medical
Goodwill [Roll Forward]
Balance as of December 31, 2016	18,401
Impact of changes in foreign currency and other	992
Balance as of June 30, 2017	$ 19,393