Goodwill Goodwill Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2016
Goodwill [Line Items]
Total goodwill impairment charges	$ 24,198		$ 77,000	$ 281,415
DMG
Goodwill [Line Items]
Total goodwill impairment charges	0			$ 253,000
Vascular access
Goodwill [Line Items]
Total goodwill impairment charges	24,198	$ 28,415	0
NEVADA | DMG
Goodwill [Line Items]
Total goodwill impairment charges	$ 0		$ 77,000