Intangible Assets - Amortized Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Intangible Assets [Line Items]
Gross Carrying Value	$ 45,790	$ 54,202
Accumulated Amortization	31,020	35,292
Net Carrying Value	14,770	18,910
Distribution Rights [Member]
Intangible Assets [Line Items]
Gross Carrying Value	38,060	38,060
Accumulated Amortization	25,193	21,908
Net Carrying Value	12,867	16,152
Customer Contracts And Relationships [Member]
Intangible Assets [Line Items]
Gross Carrying Value	6,690	14,722
Accumulated Amortization	5,310	12,648
Net Carrying Value	1,380	2,074
Developed Technology Rights [Member]
Intangible Assets [Line Items]
Gross Carrying Value	670	670
Accumulated Amortization	311	215
Net Carrying Value	359	455
Other Intangible Assets [Member]
Intangible Assets [Line Items]
Gross Carrying Value	370	750
Accumulated Amortization	206	521
Net Carrying Value	$ 164	$ 229