Accrued Expenses - Warranty Schedule (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Product Liability Contingency [Line Items]
Loss Contingency Accrual, Period Increase (Decrease)	$ (2,325,000)	$ 11,493,000	$ 7,264,000
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balance as of January 1	30,738,000	27,393,000
Warranties provided during the period	11,561,000	21,472,000
Settlements made during the period	(17,817,000)	(22,752,000)
Changes in liability for pre-existing warranties during the period, including expirations	(1,662,000)	4,625,000
Balance as of December 31	22,820,000	30,738,000	27,393,000
Europe
Product Liability Contingency [Line Items]
Additional warranty expense related to recall		3,395,000
North America/HME
Product Liability Contingency [Line Items]
Additional warranty expense related to recall		3,164,000
Loss Contingency Accrual, Period Increase (Decrease)			2,625,000
North America [Member]
Product Liability Contingency [Line Items]
Loss Contingency Accrual, Period Increase (Decrease)			$ 4,639,000
Field Action Under Review
Product Liability Contingency [Line Items]
Additional warranty expense related to recall	(2,000,000)	6,559,000
Warranty Related Sieve Bed Recall
Product Liability Contingency [Line Items]
Additional warranty expense related to recall	(250,000)	2,057,000
Warranty Related Recall
Product Liability Contingency [Line Items]
Additional warranty expense related to recall		2,877,000
Warranty Related Recall | North America/HME
Product Liability Contingency [Line Items]
Additional warranty expense related to recall	$ (75,000)	1,612,000
Warranty Related Recall | North America [Member]
Product Liability Contingency [Line Items]
Additional warranty expense related to recall		$ 1,265,000