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Intangible Assets Other Than Goodwill | 6 Months Ended
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Jun. 30, 2013
Intangible Assets Other Than Goodwill | Note 13 — Intangible Assets Other Than Goodwill Intangible assets other than goodwill consist primarily of licenses, product lines, customer relationships and trademarks. Amortized intangible assets are included in Intangibles in the accompanying balance sheets. Trademarks are disclosed separately in the accompanying balance sheets. Debt offering costs from the issuance of the Company’s convertible senior notes are included in Other Long Term Assets in the accompanying balance sheets. Intangible assets and debt issuance costs are as follows (in thousands, except for weighted useful lives):
|  |  |  |  | December 31, 2012 |  |  | June 30, 2013 |
|  | Weighted Useful Lives |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Amount |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Net Amount |
|  | (Years) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortized Intangible Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Licenses |  | 4.96 |  |  | $ | 91,488 |  |  | $ | (77,844 | ) |  | $ | 13,644 |  |  | $ | 91,488 |  |  | $ | (79,240 | ) |  | $ | 12,248 |
Product lines |  | 5.84 |  |  |  | 66,594 |  |  |  | (19,561 | ) |  |  | 47,033 |  |  |  | 66,594 |  |  |  | (20,314 | ) |  |  | 46,280 |
Customer relationships |  | 5.21 |  |  |  | 9,347 |  |  |  | (5,903 | ) |  |  | 3,444 |  |  |  | 9,347 |  |  |  | (6,444 | ) |  |  | 2,903 |
Trade names |  | 5.00 |  |  |  | 3,000 |  |  |  | (250 | ) |  |  | 2,750 |  |  |  | 3,000 |  |  |  | (550 | ) |  |  | 2,450 |
Non-compete/Employment contracts |  | 3.90 |  |  |  | 3,333 |  |  |  | (3,150 | ) |  |  | 183 |  |  |  | 3,333 |  |  |  | (3,170 | ) |  |  | 163 |
Total amortized intangible assets |  |  |  |  |  | 173,762 |  |  |  | (106,708 | ) |  |  | 67,054 |  |  |  | 173,762 |  |  |  | (109,718 | ) |  |  | 64,044 |
Deferred Costs: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs |  | 2.79 |  |  |  | 4,224 |  |  |  | (2,609 | ) |  |  | 1,615 |  |  |  | 4,224 |  |  |  | (3,243 | ) |  |  | 981 |
Unamortized Intangible Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks |  |  |  |  |  | 2,308 |  |  |  | ― |  |  |  | 2,308 |  |  |  | 2,308 |  |  |  | ― |  |  |  | 2,308 |
Total Intangible Assets: |  |  |  |  | $ | 180,294 |  |  | $ | (109,317 | ) |  | $ | 70,977 |  |  | $ | 180,294 |  |  | $ | (112,961 | ) |  | $ | 67,333 |
Amortization expense related to limited life intangible assets and debt offering costs was $1.7 million and $2.2 million for the three months ended June 30, 2012 and 2013, respectively, and $2.4 million and $3.6 million for the six months ended June 30, 2012 and 2013, respectively.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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