SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	1 Months Ended	12 Months Ended
	Oct. 31, 2013	Dec. 31, 2013 Reporting_Unit	Dec. 31, 2012
Revenue Recognition
Maximum period to exchange or return products purchased by customers (in days)		60 days
Goodwill
Number of reporting unit		1
Closing stock price	$ 37.44
Common stock, Outstanding shares	28,400	28,466	27,977
Imputed market capitalization	$ 1,100,000,000
Carrying amount of reporting unit	$ 393,000,000
Controller placements
Property and equipment
Estimated useful life, minimum (in years)		4 years
Leasehold improvements
Property and equipment
Estimated useful life, minimum (in years)		10 years
Furniture and fixtures
Property and equipment
Estimated useful life, minimum (in years)		5 years
Machinery and equipment
Property and equipment
Estimated useful life, minimum (in years)		5 years
Building
Property and equipment
Estimated useful life, minimum (in years)		30 years
Minimum | Computer equipment
Property and equipment
Estimated useful life, minimum (in years)		3 years
Minimum | Software
Property and equipment
Estimated useful life, minimum (in years)		3 years
Maximum | Computer equipment
Property and equipment
Estimated useful life, minimum (in years)		5 years
Maximum | Software
Property and equipment
Estimated useful life, minimum (in years)		5 years