Goodwill and Other Intangible Assets (Details) (USD $)
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3 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended | |||||||||||
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Dec. 31, 2013
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Mar. 31, 2014
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Mar. 31, 2013
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Mar. 31, 2012
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Sep. 27, 2013
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Dec. 31, 2012
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Dec. 31, 2013
Peripherals
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Dec. 31, 2012
Peripherals
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Mar. 31, 2014
Peripherals
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Mar. 31, 2013
Peripherals
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Mar. 31, 2012
Peripherals
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Mar. 31, 2014
Video conferencing
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Mar. 31, 2013
Video conferencing
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Mar. 31, 2012
Video conferencing
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Mar. 31, 2014
Video conferencing
Income approach analysis
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Goodwill and Other Intangible Assets | |||||||||||||||
Market capitalization | $ 2,200,000,000 | $ 1,324,236,669 | $ 1,200,000,000 | ||||||||||||
Goodwill and Other Intangibles | |||||||||||||||
Operating income | 119,303,000 | (203,268,000) | 172,725,000 | 117,000,000 | 35,000,000 | 131,326,000 | 25,829,000 | 180,167,000 | (12,023,000) | (229,097,000) | (7,442,000) | ||||
Percentage of carrying value by which the fair value of each reporting unit exceeded the carrying value | 23.00% | ||||||||||||||
CAGR assumption (as a percent) | 7.00% | ||||||||||||||
Growth rate in fiscal year 2021 (as a percent) | 4.00% | ||||||||||||||
Hypothetical decrease in CAGR rate (as a percent) | 1.40% | ||||||||||||||
Discount rate assumption (as a percent) | 15.00% | ||||||||||||||
Hypothetical increase in discount rate (as a percent) | 18.90% | ||||||||||||||
Terminal growth rate assumption (as a percent) | 4.00% | ||||||||||||||
Hypothetical decrease in terminal value (as a percent) | 0.00% | ||||||||||||||
Percentage of carrying value by which the fair value of each reporting unit exceeded the carrying value | 30.00% | ||||||||||||||
Goodwill | |||||||||||||||
Balance at the beginning of the period | 341,357,000 | 560,523,000 | 216,744,000 | 220,860,000 | 216,744,000 | 220,860,000 | 124,613,000 | 339,663,000 | |||||||
Additions | 202,000 | 202,000 | |||||||||||||
Foreign currency impact | 982,000 | (550,000) | 982,000 | (550,000) | |||||||||||
Goodwill impairment | 0 | (214,500,000) | (214,500,000) | ||||||||||||
Reclassified from (to) assets held for sale | 2,469,000 | (4,116,000) | 2,469,000 | (4,116,000) | |||||||||||
Balance at the end of the period | $ 345,010,000 | $ 341,357,000 | $ 560,523,000 | $ 219,415,000 | $ 216,744,000 | $ 220,860,000 | $ 125,595,000 | $ 124,613,000 | $ 339,663,000 |