Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets (Details)

v2.4.0.6
Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2013
Customer lists [Member]
Dec. 31, 2012
Customer lists [Member]
Mar. 31, 2013
Proprietary technologies [Member]
Dec. 31, 2012
Proprietary technologies [Member]
Mar. 31, 2013
Trade names [Member]
Dec. 31, 2012
Trade names [Member]
Mar. 31, 2013
Minimum [Member]
Customer lists [Member]
Mar. 31, 2013
Minimum [Member]
Proprietary technologies [Member]
Mar. 31, 2013
Maximum [Member]
Customer lists [Member]
Mar. 31, 2013
Maximum [Member]
Proprietary technologies [Member]
Mar. 31, 2013
Maximum [Member]
Trade names [Member]
Components of intangible assets                          
Useful Life                 4 years 5 years 12 years 8 years 5 years
Gross Carrying Amount $ 36,773 $ 36,773 $ 28,103 $ 28,103 $ 6,580 $ 6,580 $ 2,090 $ 2,090          
Accumulated Amortization (11,207) (9,623) (9,927) (8,720) (922) (657) (358) (246)          
Net Carrying Amount $ 25,566 $ 27,150 $ 18,176 $ 19,383 $ 5,658 $ 5,923 $ 1,732 $ 1,844