Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Goodwill [Roll Forward]
Balance as of December 31, 2013	$ 14,846
Goodwill acquired during the year (Note 2)	135,052
Balance as of December 31, 2014	149,898
U.S. Medical
Goodwill [Roll Forward]
Balance as of December 31, 2013	8,165
Goodwill acquired during the year (Note 2)	120,196
Balance as of December 31, 2014	128,361
International Medical
Goodwill [Roll Forward]
Balance as of December 31, 2013	6,681
Goodwill acquired during the year (Note 2)	14,856
Balance as of December 31, 2014	$ 21,537