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Deferred Revenue-Right-to-use contracts and Deferred commission expense (Tables) | 6 Months Ended
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Jun. 30, 2014
Components of Change in Deferred Revenue-Right-to-Use Contracts and Deferred Commission Expense | Components of the change in deferred revenue-right-to-use contracts and deferred commission expense are as follows (amounts in thousands):
| Six Months Ended June 30,
| 2014 |  | 2013
Deferred revenue – right-to-use contracts, as of January 1, | $ | 68,673 |  |  | $ | 62,979 |
Deferral of new right-to-use contracts | 6,012 |  |  | 6,192 |
Deferred revenue recognized | (3,697 | ) |  | (3,602 | )
Net increase in deferred revenue | 2,315 |  |  | 2,590 |
Deferred revenue – right-to-use contracts, as of June 30, | $ | 70,988 |  |  | $ | 65,569 |
Deferred commission expense, as of January 1, | $ | 25,251 |  |  | $ | 22,842 |
Costs deferred | 2,652 |  |  | 2,393 |
Commission expense recognized | (1,318 | ) |  | (1,275 | )
Net increase in deferred commission expense | 1,334 |  |  | 1,118 |
Deferred commission expense, as of June 30, | $ | 26,585 |  |  | $ | 23,960 |

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- Definition Tabular disclosure of the type of arrangements and the corresponding amounts that comprise the current and noncurrent balance of deferred revenue as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 13.A.4(a).Q1) -URI http://asc.fasb.org/extlink&oid=27012821&loc=d3e214044-122780 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 13 -Section A + Details
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