Schedule II VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
Mar. 31, 2014	Mar. 31, 2015	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014
Allowance for doubtful accounts
Valuation and qualifying accounts
Balance at Beginning of Year	$ 2,039	$ 1,798	$ 2,782	$ 1,719	$ 1,798
Additions	594	1,107	125	2,128
Deductions	835	608	868	1,065
Balance at End of Year	1,798	2,297	2,039	2,782	1,798
Allowance for sales discounts
Valuation and qualifying accounts
Balance at Beginning of Year	3,540	2,121	3,836	4,629	2,121
Additions	978	68,620	46,989	35,759
Deductions	2,397	68,393	47,285	36,552
Balance at End of Year	2,121	2,348	3,540	3,836	2,121
Allowance for sales returns
Valuation and qualifying accounts
Balance at Beginning of Year	14,554	8,586	12,905	11,313	8,586
Additions	674	94,138	67,800	53,165
Deductions	6,642	93,192	66,151	51,573
Balance at End of Year	8,586	9,532	14,554	12,905	8,586
Chargeback allowance
Valuation and qualifying accounts
Balance at Beginning of Year	4,935	3,064	5,563	4,031	3,064
Additions	213	2,610	187	5,879
Deductions	2,084	1,633	815	4,347
Balance at End of Year	$ 3,064	$ 4,041	$ 4,935	$ 5,563	$ 3,064

Total of additions to allowances and reserves, net of recoveries, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, charged to costs and expenses.

No definition available.

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- Definition

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

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Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

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