Depreciation and Amortization (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Reconciliation of Depreciation by Segment [Line Items]
Depreciation and amortization	$ 129,199		$ 85,035		$ 65,912
Dental Consumable and Laboratory Businesses Segment [Member]
Reconciliation of Depreciation by Segment [Line Items]
Depreciation and amortization	33,022		34,874		30,960
OrthodonticsCanadaMexicoJapan Segment [Member]
Reconciliation of Depreciation by Segment [Line Items]
Depreciation and amortization	5,076		4,473		4,447
Select Distribution Businesses Segments
Reconciliation of Depreciation by Segment [Line Items]
Depreciation and amortization	1,311		1,203		1,476
Implants/Endodontics/Healthcare/Pacific Rim Segments
Reconciliation of Depreciation by Segment [Line Items]
Depreciation and amortization	87,324		41,886		22,297
All Other
Reconciliation of Depreciation by Segment [Line Items]
Depreciation and amortization	$ 2,466	[1]	$ 2,599	[1]	$ 6,732	[1]

[1] Includes amounts recorded at Corporate headquarters.